diff --git a/.eslintrc.js b/.eslintrc.js
new file mode 100644
index 0000000..3d24adb
--- /dev/null
+++ b/.eslintrc.js
@@ -0,0 +1,18 @@
+module.exports = {
+  extends: [
+    "google",
+    "plugin:prettier/recommended"
+  ],
+  rules: {
+    "no-undef": "error"
+  },
+  env: {
+    es6: true,
+    node: true,
+    jest: true
+  },
+  parserOptions: {
+    sourceType: "module",
+    ecmaVersion: 2018
+  }
+};
diff --git a/.gitignore b/.gitignore
index 25fbf5a..2f24c57 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 node_modules/
 coverage/
+.nyc_output/
diff --git a/index.js b/index.js
index 0cba240..dd2b16e 100644
--- a/index.js
+++ b/index.js
@@ -1,14 +1,10 @@
+const https = require("https");
 const isEmpty = require("lodash.isempty");
 const debug = require("debug")("buzzapi");
 const hyperid = require("hyperid")({ fixedLength: true, urlSafe: true });
 const os = require("os");
-let request = require("requestretry");
-const util = require("util");
 const BuzzAPIError = require("./buzzApiError");
 
-// Enable cookies
-request = request.defaults({ jar: true });
-
 const BuzzAPI = function(config) {
   const that = this;
 
@@ -16,93 +12,78 @@ const BuzzAPI = function(config) {
     api_app_id: config.apiUser,
     api_app_password: Buffer.from(config.apiPassword).toString("base64"),
     api_request_mode: config.sync ? "sync" : "async",
-    ticket: /.*/,
+    ticket: "",
     api_receive_timeout: config.api_receive_timeout || 900000
   };
 
   const server = config.server || "https://api.gatech.edu";
 
-  let openReqs = 0;
-  const queuedReqs = [];
+  const fetch = require("make-fetch-happen").defaults({
+    retry: { retries: 5, randomize: true },
+    onRetry: () => debug("Retrying a request"),
+    agent: https.globalAgent
+  });
+
   const unresolved = {};
   let gettingResult = false;
-  let ticket = "";
 
-  this.post = function(resource, operation, data, callback) {
-    if (openReqs >= 20) {
-      return new Promise((res, rej) => {
-        queuedReqs.push({ args: arguments, res: res, rej: rej });
-      });
-    } else {
-      return doPost(resource, operation, data, callback);
-    }
-  };
-
-  const doPost = function(resource, operation, data, callback) {
+  this.post = function(resource, operation, data) {
     debug("Options: " + JSON.stringify(that.options));
     return new Promise((res, rej) => {
-      openReqs++;
-      if (typeof data === "function") {
-        callback = data;
-        data = {};
-      }
-      const myOpts = {};
-      myOpts.url = `${server}/apiv3/${resource}/${operation}`;
-      myOpts.api_client_request_handle =
-        data.api_client_request_handle ||
-        `${process.pid}@${os.hostname()}-${hyperid()}`;
-      myOpts.json = Object.assign(data, that.options);
+      const myOpts = {
+        method: "POST",
+        body: JSON.stringify({
+          ...that.options,
+          ...data,
+          api_client_request_handle:
+            data.api_client_request_handle ||
+            `${process.pid}@${os.hostname()}-${hyperid()}`
+        })
+      };
       debug("Requesting %s", JSON.stringify(myOpts));
-      request.post(myOpts, function(err, response, body) {
-        if (response && response.attempts && response.attempts > 1) {
-          debug("Request took multiple attempts %s", response.attempts);
-        }
-        if (err || response.statusCode > 299 || body.api_error_info) {
-          if (body) {
-            const error = new BuzzAPIError(err, body.api_error_info, body);
-            return callback ? callback(error, null, body) : rej(error);
-          } else {
-            const error = new BuzzAPIError(err);
-            return callback ? callback(error) : rej(error);
+      return fetch(`${server}/apiv3/${resource}/${operation}`, myOpts).then(
+        response => {
+          if (!response.ok || response.status > 299) {
+            return rej(new BuzzAPIError(null, null, response.statusText));
           }
-        } else if (that.options.api_request_mode === "sync") {
-          debug("Sync was set, returning the result");
-          resolve();
-          return callback
-            ? callback(null, body.api_result_data, body)
-            : res(body.api_result_data);
-        } else {
-          debug(
-            "Got messageId: %s for %s",
-            body.api_result_data,
-            myOpts.api_client_request_handle
-          );
-          unresolved[body.api_result_data] = {
-            resolve: res,
-            reject: rej,
-            callback: callback,
-            initTime: new Date()
-          };
-          ticket = body.api_app_ticket;
-          return getResult();
+          response
+            .json()
+            .then(json => {
+              if (json.api_error_info) {
+                const error = new BuzzAPIError(
+                  new Error(),
+                  json.api_error_info,
+                  json
+                );
+                return rej(error);
+              } else if (that.options.api_request_mode === "sync") {
+                debug("Sync was set, returning the result");
+                return res(json.api_result_data);
+              } else {
+                debug(
+                  "Got messageId: %s for %s",
+                  json.api_result_data,
+                  myOpts.body.api_client_request_handle
+                );
+                unresolved[json.api_result_data] = {
+                  resolve: res,
+                  reject: rej,
+                  initTime: new Date()
+                };
+                that.options.ticket = json.api_app_ticket;
+                return getResult();
+              }
+            })
+            .catch(err => rej(new BuzzAPIError()));
         }
-      });
+      );
     });
   };
 
   const resolve = function(messageId) {
-    openReqs--;
-    debug("queued: %s  open: %s", queuedReqs.length, openReqs);
     if (messageId) {
       delete unresolved[messageId];
     }
-    if (queuedReqs[0]) {
-      const next = queuedReqs.pop();
-      return doPost
-        .apply(null, next.args)
-        .then(next.res)
-        .catch(next.rej);
-    }
   };
 
   const cleanupExpired = function() {
@@ -112,11 +93,7 @@ const BuzzAPI = function(config) {
         that.options.api_receive_timeout
       ) {
         const err = new Error("Request timed out for: " + messageId);
-        if (unresolved[messageId].callback) {
-          unresolved[messageId].callback(err);
-        } else {
-          unresolved[messageId].reject(err);
-        }
+        unresolved[messageId].reject(err);
         resolve(messageId);
       }
     });
@@ -141,112 +118,90 @@ const BuzzAPI = function(config) {
     }
     const handle = `${process.pid}@${os.hostname()}-${hyperid()}`;
     debug("Asking for result of %s using handle %s", messageIds, handle);
-    request.post(
-      {
-        url: util.format("%s/apiv3/api.my_messages", server),
-        json: {
-          api_operation: "read",
-          api_app_ticket: ticket,
-          api_pull_response_to: messageIds,
-          api_receive_timeout: 5000,
-          api_client_request_handle: handle
-        }
-      },
-      (err, response, body) => {
-        gettingResult = false;
-        if (response && response.attempts && response.attempts > 1) {
-          debug("Request took multiple attempts %s", response.attempts);
-        }
+    return fetch(`${server}/apiv3/api.my_messages`, {
+      method: "POST",
+      body: JSON.stringify({
+        api_operation: "read",
+        api_app_ticket: that.options.ticket,
+        api_pull_response_to: messageIds,
+        api_receive_timeout: 5000,
+        api_client_request_handle: handle
+      })
+    }).then(response => {
+      gettingResult = false;
+      if (!response.ok || response.status > 299) {
+        messageIds.map(messageId => {
+          const message = unresolved[messageId];
+          message.reject(new BuzzAPIError(null, null, response.statusText));
+          resolve(messageId);
+        });
+        return Promise.reject(
+          new BuzzAPIError(null, null, response.statusText)
+        );
+      }
+
+      response.json().then(json => {
         if (
-          err ||
-          response.statusCode > 299 ||
-          body.api_error_info ||
-          (body.api_result_data && body.api_result_data.api_error_info)
+          json.api_error_info ||
+          (json.api_result_data && json.api_result_data.api_error_info)
         ) {
-          if (!body) {
-            messageIds.map(messageId => {
-              const message = unresolved[messageId];
-              if (message.callback) {
-                message.callback(new BuzzAPIError(err), null);
-              } else {
-                message.reject(new BuzzAPIError(err));
-              }
-              resolve(messageId);
-            });
-            return;
-          }
-          if (body.api_error_info) {
+          if (json.api_error_info) {
             const message =
-              unresolved[body.api_error_info.api_request_messageid];
+              unresolved[json.api_error_info.api_request_messageid];
             const err = new BuzzAPIError(
               "BuzzApi returned error_info",
-              body.api_error_info,
-              body
+              json.api_error_info,
+              json
             );
             debug(unresolved);
-            debug(body);
+            debug(json);
             if (message) {
-              return message.callback
-                ? message.callback(err, null)
-                : message.reject(err);
+              resolve(json.api_error_info.api_request_messageid);
+              return message.reject(err);
             } else {
               // We don't know which message threw the error, so invalidate all of them
               messageIds.map(messageId => {
                 const m = unresolved[messageId];
-                if (m.callback) {
-                  m.callback(err, null);
-                } else {
-                  m.reject(err);
-                }
+                m.reject(err);
                 resolve(messageId);
               });
               return;
             }
-          } else if (body.api_result_data) {
-            const messageId = body.api_result_data.api_request_messageid;
+          } else if (json.api_result_data) {
+            const messageId = json.api_result_data.api_request_messageid;
             const message = unresolved[messageId];
             resolve(messageId);
             const err = new BuzzAPIError(
               "BuzzApi returned error_info",
-              body.api_result_data.api_error_info,
-              body
+              json.api_result_data.api_error_info,
+              json
             );
-            return message.callback
-              ? message.callback(err, null)
-              : message.reject(err);
+            return message.reject(err);
           } else {
             messageIds.map(messageId => {
-              const error = new BuzzAPIError(err, body, body);
+              const error = new BuzzAPIError(new Error(), json, json);
               const message = unresolved[messageId];
-              if (message.callback) {
-                message.callback(error, null);
-              } else {
-                message.reject(error);
-              }
               resolve(messageId);
+              return message.reject(error);
             });
-            return;
           }
-        } else if (isEmpty(body.api_result_data)) {
+        } else if (isEmpty(json.api_result_data)) {
           // Empty result_data here means our data isn't ready, wait 1 to 5 seconds and try again
           debug("Result not ready for " + messageIds);
           return scheduleRetry();
         } else {
-          const messageId = body.api_result_data.api_request_messageid;
+          const messageId = json.api_result_data.api_request_messageid;
           const message = unresolved[messageId];
           debug("Got result for ", messageId);
           resolve(messageId);
-          if (message.callback) {
-            message.callback(null, body.api_result_data.api_result_data, body);
-          } else {
-            message.resolve(body.api_result_data.api_result_data);
-          }
+          message.resolve(json.api_result_data.api_result_data);
           if (Object.keys(unresolved).length > 0) {
             getResult();
           }
+          return;
         }
-      }
-    );
+      });
+    });
   };
 };
 
diff --git a/package-lock.json b/package-lock.json
index 069322a..358ee84 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8,27 +8,98 @@
       "version": "7.0.0",
       "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.0.0.tgz",
       "integrity": "sha512-OfC2uemaknXr87bdLUkWog7nYuliM9Ij5HUcajsVcMCpQrcLmtxRbVFTIqmcSkSeYRBFBRxs2FiUqFJDLdiebA==",
-      "dev": true,
       "requires": {
         "@babel/highlight": "^7.0.0"
       }
     },
+    "@babel/generator": {
+      "version": "7.4.4",
+      "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.4.4.tgz",
+      "integrity": "sha512-53UOLK6TVNqKxf7RUh8NE851EHRxOOeVXKbK2bivdb+iziMyk03Sr4eaE9OELCbyZAAafAKPDwF2TPUES5QbxQ==",
+      "requires": {
+        "@babel/types": "^7.4.4",
+        "jsesc": "^2.5.1",
+        "lodash": "^4.17.11",
+        "source-map": "^0.5.0",
+        "trim-right": "^1.0.1"
+      }
+    },
+    "@babel/helper-function-name": {
+      "version": "7.1.0",
+      "resolved": "https://registry.npmjs.org/@babel/helper-function-name/-/helper-function-name-7.1.0.tgz",
+      "integrity": "sha512-A95XEoCpb3TO+KZzJ4S/5uW5fNe26DjBGqf1o9ucyLyCmi1dXq/B3c8iaWTfBk3VvetUxl16e8tIrd5teOCfGw==",
+      "requires": {
+        "@babel/helper-get-function-arity": "^7.0.0",
+        "@babel/template": "^7.1.0",
+        "@babel/types": "^7.0.0"
+      }
+    },
+    "@babel/helper-get-function-arity": {
+      "version": "7.0.0",
+      "resolved": "https://registry.npmjs.org/@babel/helper-get-function-arity/-/helper-get-function-arity-7.0.0.tgz",
+      "integrity": "sha512-r2DbJeg4svYvt3HOS74U4eWKsUAMRH01Z1ds1zx8KNTPtpTL5JAsdFv8BNyOpVqdFhHkkRDIg5B4AsxmkjAlmQ==",
+      "requires": {
+        "@babel/types": "^7.0.0"
+      }
+    },
+    "@babel/helper-split-export-declaration": {
+      "version": "7.4.4",
+      "resolved": "https://registry.npmjs.org/@babel/helper-split-export-declaration/-/helper-split-export-declaration-7.4.4.tgz",
+      "integrity": "sha512-Ro/XkzLf3JFITkW6b+hNxzZ1n5OQ80NvIUdmHspih1XAhtN3vPTuUFT4eQnela+2MaZ5ulH+iyP513KJrxbN7Q==",
+      "requires": {
+        "@babel/types": "^7.4.4"
+      }
+    },
     "@babel/highlight": {
       "version": "7.0.0",
       "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.0.0.tgz",
       "integrity": "sha512-UFMC4ZeFC48Tpvj7C8UgLvtkaUuovQX+5xNWrsIoMG8o2z+XFKjKaN9iVmS84dPwVN00W4wPmqvYoZF3EGAsfw==",
-      "dev": true,
       "requires": {
         "chalk": "^2.0.0",
         "esutils": "^2.0.2",
         "js-tokens": "^4.0.0"
       }
     },
-    "abbrev": {
-      "version": "1.0.9",
-      "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.0.9.tgz",
-      "integrity": "sha1-kbR5JYinc4wl813W9jdSovh3YTU=",
-      "dev": true
+    "@babel/parser": {
+      "version": "7.4.5",
+      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.4.5.tgz",
+      "integrity": "sha512-9mUqkL1FF5T7f0WDFfAoDdiMVPWsdD1gZYzSnaXsxUCUqzuch/8of9G3VUSNiZmMBoRxT3neyVsqeiL/ZPcjew=="
+    },
+    "@babel/template": {
+      "version": "7.4.4",
+      "resolved": "https://registry.npmjs.org/@babel/template/-/template-7.4.4.tgz",
+      "integrity": "sha512-CiGzLN9KgAvgZsnivND7rkA+AeJ9JB0ciPOD4U59GKbQP2iQl+olF1l76kJOupqidozfZ32ghwBEJDhnk9MEcw==",
+      "requires": {
+        "@babel/code-frame": "^7.0.0",
+        "@babel/parser": "^7.4.4",
+        "@babel/types": "^7.4.4"
+      }
+    },
+    "@babel/traverse": {
+      "version": "7.4.5",
+      "resolved": "https://registry.npmjs.org/@babel/traverse/-/traverse-7.4.5.tgz",
+      "integrity": "sha512-Vc+qjynwkjRmIFGxy0KYoPj4FdVDxLej89kMHFsWScq999uX+pwcX4v9mWRjW0KcAYTPAuVQl2LKP1wEVLsp+A==",
+      "requires": {
+        "@babel/code-frame": "^7.0.0",
+        "@babel/generator": "^7.4.4",
+        "@babel/helper-function-name": "^7.1.0",
+        "@babel/helper-split-export-declaration": "^7.4.4",
+        "@babel/parser": "^7.4.5",
+        "@babel/types": "^7.4.4",
+        "debug": "^4.1.0",
+        "globals": "^11.1.0",
+        "lodash": "^4.17.11"
+      }
+    },
+    "@babel/types": {
+      "version": "7.4.4",
+      "resolved": "https://registry.npmjs.org/@babel/types/-/types-7.4.4.tgz",
+      "integrity": "sha512-dOllgYdnEFOebhkKCjzSVFqw/PmmB8pH6RGOWkY4GsboQNd47b1fBThBSwlHAq9alF9vc1M3+6oqR47R50L0tQ==",
+      "requires": {
+        "esutils": "^2.0.2",
+        "lodash": "^4.17.11",
+        "to-fast-properties": "^2.0.0"
+      }
     },
     "acorn": {
       "version": "6.1.1",
@@ -42,24 +113,39 @@
       "integrity": "sha512-HJ7CfNHrfJLlNTzIEUTj43LNWGkqpRLxm3YjAlcD0ACydk9XynzYsCBHxut+iqt+1aBXkx9UP/w/ZqMr13XIzg==",
       "dev": true
     },
+    "agent-base": {
+      "version": "4.2.1",
+      "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-4.2.1.tgz",
+      "integrity": "sha512-JVwXMr9nHYTUXsBFKUqhJwvlcYU/blreOEUkhNR2eXZIvwd+c+o5V4MgDPKWnMS/56awN3TRzIP+KoPn+roQtg==",
+      "requires": {
+        "es6-promisify": "^5.0.0"
+      }
+    },
+    "agentkeepalive": {
+      "version": "3.5.2",
+      "resolved": "https://registry.npmjs.org/agentkeepalive/-/agentkeepalive-3.5.2.tgz",
+      "integrity": "sha512-e0L/HNe6qkQ7H19kTlRRqUibEAwDK5AFk6y3PtMsuut2VAH6+Q4xZml1tNDJD7kSAyqmbG/K08K5WEJYtUrSlQ==",
+      "requires": {
+        "humanize-ms": "^1.2.1"
+      }
+    },
     "ajv": {
-      "version": "5.5.0",
-      "resolved": "https://registry.npmjs.org/ajv/-/ajv-5.5.0.tgz",
-      "integrity": "sha1-6yhAdG6dxIvV4GOjbj/UAMXqtak=",
+      "version": "6.10.0",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.10.0.tgz",
+      "integrity": "sha512-nffhOpkymDECQyR0mnsUtoCE8RlX38G0rYP+wgLWFyZuUyuuojSSvi/+euOiQBIn63whYwYVIIH1TvE3tu4OEg==",
       "dev": true,
       "requires": {
-        "co": "^4.6.0",
-        "fast-deep-equal": "^1.0.0",
+        "fast-deep-equal": "^2.0.1",
         "fast-json-stable-stringify": "^2.0.0",
-        "json-schema-traverse": "^0.3.0"
+        "json-schema-traverse": "^0.4.1",
+        "uri-js": "^4.2.2"
       }
     },
-    "amdefine": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/amdefine/-/amdefine-1.0.1.tgz",
-      "integrity": "sha1-SlKCrBZHKek2Gbz9OtFR+BfOkfU=",
-      "dev": true,
-      "optional": true
+    "ansi-colors": {
+      "version": "3.2.3",
+      "resolved": "https://registry.npmjs.org/ansi-colors/-/ansi-colors-3.2.3.tgz",
+      "integrity": "sha512-LEHHyuhlPY3TmuUYMh2oz89lTShfvgbmzaBcxve9t/9Wuy7Dwf4yoAKcND7KFT1HAQfqZ12qtc+DUrBMeKF9nw==",
+      "dev": true
     },
     "ansi-escapes": {
       "version": "3.2.0",
@@ -70,23 +156,38 @@
     "ansi-regex": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-3.0.0.tgz",
-      "integrity": "sha1-7QMXwyIGT3lGbAKWa922Bas32Zg=",
-      "dev": true
+      "integrity": "sha1-7QMXwyIGT3lGbAKWa922Bas32Zg="
     },
     "ansi-styles": {
       "version": "3.2.1",
       "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
       "integrity": "sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==",
-      "dev": true,
       "requires": {
         "color-convert": "^1.9.0"
       }
     },
+    "append-transform": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/append-transform/-/append-transform-1.0.0.tgz",
+      "integrity": "sha512-P009oYkeHyU742iSZJzZZywj4QRJdnTWffaKuJQLablCZ1uz6/cW4yaRgcDaoQ+uwOxxnt0gRUcwfsNP2ri0gw==",
+      "requires": {
+        "default-require-extensions": "^2.0.0"
+      }
+    },
+    "aproba": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/aproba/-/aproba-1.2.0.tgz",
+      "integrity": "sha512-Y9J6ZjXtoYh8RnXVCMOU/ttDmk1aBjunq9vO0ta5x85WDQiQfUF9sIPBITdbiiIVcBo03Hi3jMxigBtsddlXRw=="
+    },
+    "archy": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/archy/-/archy-1.0.0.tgz",
+      "integrity": "sha1-+cjBN1fMHde8N5rHeyxipcKGjEA="
+    },
     "argparse": {
       "version": "1.0.9",
       "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.9.tgz",
       "integrity": "sha1-c9g7wmP4bpf4zE9rrhsOkKfSLIY=",
-      "dev": true,
       "requires": {
         "sprintf-js": "~1.0.2"
       }
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+      "version": "3.0.4",
+      "resolved": "https://registry.npmjs.org/validate-npm-package-license/-/validate-npm-package-license-3.0.4.tgz",
+      "integrity": "sha512-DpKm2Ui/xN7/HQKCtpZxoRWBhZ9Z0kqtygG8XCgNQ8ZlDnxuQmWhj566j8fN4Cu3/JmbhsDo7fcAJq4s9h27Ew==",
+      "requires": {
+        "spdx-correct": "^3.0.0",
+        "spdx-expression-parse": "^3.0.0"
+      }
     },
     "verror": {
       "version": "1.10.0",
       "resolved": "https://registry.npmjs.org/verror/-/verror-1.10.0.tgz",
       "integrity": "sha1-OhBcoXBTr1XW4nDB+CiGguGNpAA=",
+      "dev": true,
       "requires": {
         "assert-plus": "^1.0.0",
         "core-util-is": "1.0.2",
         "extsprintf": "^1.2.0"
       }
     },
-    "when": {
-      "version": "3.7.8",
-      "resolved": "https://registry.npmjs.org/when/-/when-3.7.8.tgz",
-      "integrity": "sha1-xxMLan6gRpPoQs3J56Hyqjmjn4I="
-    },
     "which": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/which/-/which-1.3.0.tgz",
       "integrity": "sha512-xcJpopdamTuY5duC/KnTTNBraPK54YwpenP4lzxU8H91GudWpFv38u0CKjclE1Wi2EH2EDz5LRcHcKbCIzqGyg==",
-      "dev": true,
       "requires": {
         "isexe": "^2.0.0"
       }
     },
+    "which-module": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/which-module/-/which-module-2.0.0.tgz",
+      "integrity": "sha1-2e8H3Od7mQK4o6j6SzHD4/fm6Ho="
+    },
+    "wide-align": {
+      "version": "1.1.3",
+      "resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.3.tgz",
+      "integrity": "sha512-QGkOQc8XL6Bt5PwnsExKBPuMKBxnGxWWW3fU55Xt4feHozMUhdUMaBCk290qpm/wG5u/RSKzwdAC4i51YigihA==",
+      "dev": true,
+      "requires": {
+        "string-width": "^1.0.2 || 2"
+      }
+    },
     "wordwrap": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-1.0.0.tgz",
       "integrity": "sha1-J1hIEIkUVqQXHI0CJkQa3pDLyus=",
       "dev": true
     },
+    "wrap-ansi": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
+      "integrity": "sha1-2Pw9KE3QV5T+hJc8rs3Rz4JP3YU=",
+      "requires": {
+        "string-width": "^1.0.1",
+        "strip-ansi": "^3.0.1"
+      },
+      "dependencies": {
+        "ansi-regex": {
+          "version": "2.1.1",
+          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
+          "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8="
+        },
+        "is-fullwidth-code-point": {
+          "version": "1.0.0",
+          "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-1.0.0.tgz",
+          "integrity": "sha1-754xOG8DGn8NZDr4L95QxFfvAMs=",
+          "requires": {
+            "number-is-nan": "^1.0.0"
+          }
+        },
+        "string-width": {
+          "version": "1.0.2",
+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
+          "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
+          "requires": {
+            "code-point-at": "^1.0.0",
+            "is-fullwidth-code-point": "^1.0.0",
+            "strip-ansi": "^3.0.0"
+          }
+        },
+        "strip-ansi": {
+          "version": "3.0.1",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
+          "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
+          "requires": {
+            "ansi-regex": "^2.0.0"
+          }
+        }
+      }
+    },
     "wrappy": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
-      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
-      "dev": true
+      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
     },
     "write": {
       "version": "1.0.3",
@@ -2008,6 +3251,138 @@
       "requires": {
         "mkdirp": "^0.5.1"
       }
+    },
+    "write-file-atomic": {
+      "version": "2.4.3",
+      "resolved": "https://registry.npmjs.org/write-file-atomic/-/write-file-atomic-2.4.3.tgz",
+      "integrity": "sha512-GaETH5wwsX+GcnzhPgKcKjJ6M2Cq3/iZp1WyY/X1CSqrW+jVNM9Y7D8EC2sM4ZG/V8wZlSniJnCKWPmBYAucRQ==",
+      "requires": {
+        "graceful-fs": "^4.1.11",
+        "imurmurhash": "^0.1.4",
+        "signal-exit": "^3.0.2"
+      }
+    },
+    "xtend": {
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.1.tgz",
+      "integrity": "sha1-pcbVMr5lbiPbgg77lDofBJmNY68="
+    },
+    "y18n": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.0.tgz",
+      "integrity": "sha512-r9S/ZyXu/Xu9q1tYlpsLIsa3EeLXXk0VwlxqTcFRfg9EhMW+17kbt9G0NrgCmhGb5vT2hyhJZLfDGx+7+5Uj/w=="
+    },
+    "yallist": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.0.3.tgz",
+      "integrity": "sha512-S+Zk8DEWE6oKpV+vI3qWkaK+jSbIK86pCwe2IF/xwIpQ8jEuxpw9NyaGjmp9+BoJv5FV2piqCDcoCtStppiq2A=="
+    },
+    "yargs": {
+      "version": "13.2.2",
+      "resolved": "https://registry.npmjs.org/yargs/-/yargs-13.2.2.tgz",
+      "integrity": "sha512-WyEoxgyTD3w5XRpAQNYUB9ycVH/PQrToaTXdYXRdOXvEy1l19br+VJsc0vcO8PTGg5ro/l/GY7F/JMEBmI0BxA==",
+      "requires": {
+        "cliui": "^4.0.0",
+        "find-up": "^3.0.0",
+        "get-caller-file": "^2.0.1",
+        "os-locale": "^3.1.0",
+        "require-directory": "^2.1.1",
+        "require-main-filename": "^2.0.0",
+        "set-blocking": "^2.0.0",
+        "string-width": "^3.0.0",
+        "which-module": "^2.0.0",
+        "y18n": "^4.0.0",
+        "yargs-parser": "^13.0.0"
+      },
+      "dependencies": {
+        "ansi-regex": {
+          "version": "4.1.0",
+          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-4.1.0.tgz",
+          "integrity": "sha512-1apePfXM1UOSqw0o9IiFAovVz9M5S1Dg+4TrDwfMewQ6p/rmMueb7tWZjQ1rx4Loy1ArBggoqGpfqqdI4rondg=="
+        },
+        "string-width": {
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-3.1.0.tgz",
+          "integrity": "sha512-vafcv6KjVZKSgz06oM/H6GDBrAtz8vdhQakGjFIvNrHA6y3HCF1CInLy+QLq8dTJPQ1b+KDUqDFctkdRW44e1w==",
+          "requires": {
+            "emoji-regex": "^7.0.1",
+            "is-fullwidth-code-point": "^2.0.0",
+            "strip-ansi": "^5.1.0"
+          }
+        },
+        "strip-ansi": {
+          "version": "5.2.0",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-5.2.0.tgz",
+          "integrity": "sha512-DuRs1gKbBqsMKIZlrffwlug8MHkcnpjs5VPmL1PAh+mA30U0DTotfDZ0d2UUsXpPmPmMMJ6W773MaA3J+lbiWA==",
+          "requires": {
+            "ansi-regex": "^4.1.0"
+          }
+        }
+      }
+    },
+    "yargs-parser": {
+      "version": "13.0.0",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-13.0.0.tgz",
+      "integrity": "sha512-w2LXjoL8oRdRQN+hOyppuXs+V/fVAYtpcrRxZuF7Kt/Oc+Jr2uAcVntaUTNT6w5ihoWfFDpNY8CPx1QskxZ/pw==",
+      "requires": {
+        "camelcase": "^5.0.0",
+        "decamelize": "^1.2.0"
+      }
+    },
+    "yargs-unparser": {
+      "version": "1.5.0",
+      "resolved": "https://registry.npmjs.org/yargs-unparser/-/yargs-unparser-1.5.0.tgz",
+      "integrity": "sha512-HK25qidFTCVuj/D1VfNiEndpLIeJN78aqgR23nL3y4N0U/91cOAzqfHlF8n2BvoNDcZmJKin3ddNSvOxSr8flw==",
+      "dev": true,
+      "requires": {
+        "flat": "^4.1.0",
+        "lodash": "^4.17.11",
+        "yargs": "^12.0.5"
+      },
+      "dependencies": {
+        "get-caller-file": {
+          "version": "1.0.3",
+          "resolved": "https://registry.npmjs.org/get-caller-file/-/get-caller-file-1.0.3.tgz",
+          "integrity": "sha512-3t6rVToeoZfYSGd8YoLFR2DJkiQrIiUrGcjvFX2mDw3bn6k2OtwHN0TNCLbBO+w8qTvimhDkv+LSscbJY1vE6w==",
+          "dev": true
+        },
+        "require-main-filename": {
+          "version": "1.0.1",
+          "resolved": "https://registry.npmjs.org/require-main-filename/-/require-main-filename-1.0.1.tgz",
+          "integrity": "sha1-l/cXtp1IeE9fUmpsWqj/3aBVpNE=",
+          "dev": true
+        },
+        "yargs": {
+          "version": "12.0.5",
+          "resolved": "https://registry.npmjs.org/yargs/-/yargs-12.0.5.tgz",
+          "integrity": "sha512-Lhz8TLaYnxq/2ObqHDql8dX8CJi97oHxrjUcYtzKbbykPtVW9WB+poxI+NM2UIzsMgNCZTIf0AQwsjK5yMAqZw==",
+          "dev": true,
+          "requires": {
+            "cliui": "^4.0.0",
+            "decamelize": "^1.2.0",
+            "find-up": "^3.0.0",
+            "get-caller-file": "^1.0.1",
+            "os-locale": "^3.0.0",
+            "require-directory": "^2.1.1",
+            "require-main-filename": "^1.0.1",
+            "set-blocking": "^2.0.0",
+            "string-width": "^2.0.0",
+            "which-module": "^2.0.0",
+            "y18n": "^3.2.1 || ^4.0.0",
+            "yargs-parser": "^11.1.1"
+          }
+        },
+        "yargs-parser": {
+          "version": "11.1.1",
+          "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-11.1.1.tgz",
+          "integrity": "sha512-C6kB/WJDiaxONLJQnF8ccx9SEeoTTLek8RVbaOIsrAUS8VrBEXfmeSnCZxygc+XC2sNMBIwOOnfcxiynjHsVSQ==",
+          "dev": true,
+          "requires": {
+            "camelcase": "^5.0.0",
+            "decamelize": "^1.2.0"
+          }
+        }
+      }
     }
   }
 }
diff --git a/package.json b/package.json
index af48f3c..d40b19b 100644
--- a/package.json
+++ b/package.json
@@ -5,30 +5,29 @@
   "repository": "https://github.com/stuartf/buzzapi-node.git",
   "main": "index.js",
   "scripts": {
-    "test": "mocha",
-    "cover": "istanbul cover _mocha",
-    "coveralls": "npm run cover -- --report lcovonly && cat ./coverage/lcov.info | coveralls"
+    "test": "nyc mocha",
+    "coveralls": "npm run test; nyc report --reporter=text-lcov | coveralls"
   },
   "author": "D. Stuart Freeman",
   "license": "ISC",
   "dependencies": {
-    "debug": "^4.1.0",
-    "hyperid": "^2.0.0",
+    "debug": "^4.1.1",
+    "hyperid": "^2.0.2",
+    "lodash.assign": "^4.2.0",
     "lodash.isempty": "^4.4.0",
-    "request": "^2.88.0",
-    "requestretry": "^3.0.2"
+    "make-fetch-happen": "^4.0.1",
+    "nyc": "^14.1.1"
   },
   "devDependencies": {
     "chai": "^4.2.0",
-    "coveralls": "^3.0.2",
+    "coveralls": "^3.0.3",
     "eslint": "^5.16.0",
-    "eslint-config-google": "^0.12.0",
-    "eslint-config-prettier": "^4.1.0",
-    "eslint-plugin-prettier": "^3.0.1",
-    "istanbul": "^0.4.5",
-    "mocha": "^5.2.0",
+    "eslint-config-google": "^0.13.0",
+    "eslint-config-prettier": "^4.3.0",
+    "eslint-plugin-prettier": "^3.1.0",
+    "mocha": "^6.1.4",
     "mocha-lcov-reporter": "^1.3.0",
-    "nock": "^10.0.2",
-    "prettier": "^1.17.0"
+    "nock": "^10.0.6",
+    "prettier": "^1.17.1"
   }
 }
diff --git a/test/index.test.js b/test/index.test.js
index ce168b1..48c0d18 100644
--- a/test/index.test.js
+++ b/test/index.test.js
@@ -65,33 +65,7 @@ describe("Sync tests", () => {
       .reply(400);
     return buzzapisync.post("test", "test", {}).catch(err => {
       expect(err.message).to.equal("BuzzApi error");
-      return expect(err.buzzApiBody).to.be.empty;
-    });
-  });
-
-  it("Responds via callback if provided", done => {
-    api
-      .post("/apiv3/test/test", () => {
-        return true;
-      })
-      .reply(200, response.sync);
-    buzzapisync.post("test", "test", (err, response) => {
-      expect(typeof response).to.equal("object");
-      expect(response.success);
-      done();
-    });
-  });
-
-  it("Sends errors via callback if provided", done => {
-    api
-      .post("/apiv3/test/test", () => {
-        return true;
-      })
-      .reply(404, "Not Found");
-    buzzapisync.post("test", "test", (err, response) => {
-      expect(response).to.be.null;
-      expect(err.buzzApiBody).to.equal("Not Found");
-      done();
+      return expect(err.buzzApiBody).to.equal("Bad Request");
     });
   });
 
@@ -192,36 +166,6 @@ describe("Async tests", () => {
     });
   });
 
-  it("Responds via callback if provided", done => {
-    api
-      .post("/apiv3/test/test", () => {
-        return true;
-      })
-      .reply(200, response.async);
-    api
-      .post("/apiv3/api.my_messages", defaultBody)
-      .reply(200, response.asyncSuccess);
-    buzzapi.post("test", "test", (err, response) => {
-      expect(typeof response).to.equal("object");
-      expect(response.success);
-      done();
-    });
-  });
-
-  it("Responds via callback if provided", done => {
-    api
-      .post("/apiv3/test/test", () => {
-        return true;
-      })
-      .reply(200, response.async);
-    api.post("/apiv3/api.my_messages", defaultBody).reply(404, "Not Found");
-    buzzapi.post("test", "test", (err, response) => {
-      expect(response).to.be.null;
-      expect(err.buzzApiBody).to.equal("Not Found");
-      done();
-    });
-  });
-
   it("Handles errors with no body set", () => {
     api
       .post("/apiv3/test/test", () => {
@@ -231,7 +175,7 @@ describe("Async tests", () => {
     api.post("/apiv3/api.my_messages", defaultBody).reply(400);
     return buzzapi.post("test", "test", {}).catch(err => {
       expect(err.message).to.equal("BuzzApi error");
-      return expect(err.buzzApiBody).to.be.empty;
+      return expect(err.buzzApiBody).to.equal("Bad Request");
     });
   });