diff --git a/package.json b/package.json
index 1f1cd62..4aca9af 100644
--- a/package.json
+++ b/package.json
@@ -40,6 +40,7 @@
     "replay": "^2.3.0",
     "rollup": "^0.62.0",
     "rollup-plugin-babel": "^3.0.7",
+    "rollup-plugin-json": "^3.0.0",
     "rollup-plugin-uglify": "^4.0.0"
   }
 }
diff --git a/rollup.config.js b/rollup.config.js
index f17c409..fee0e2b 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -1,5 +1,6 @@
 import babel from "rollup-plugin-babel";
 import { uglify } from "rollup-plugin-uglify";
+import json from "rollup-plugin-json";
 
 import pkg from "./package.json";
 
@@ -8,18 +9,19 @@ export default [
     input: "src/swiftype_app_search.js",
     output: [
       {
-        // browser-friendly UMD build
+        // browser-friendly UMD build, for Browsers or Node
         name: "SwiftypeAppSearch",
         file: "dist/swiftype_app_search.umd.js",
         format: "umd"
       },
       {
-        // ES6 module build
+        // ES6 module build, for things like Rollup
         file: pkg.module,
         format: "es"
       }
     ],
     plugins: [
+      json(), // So we can import thing like `package.json` as a module
       babel({
         exclude: "node_modules/**" // only transpile our source code
       })
@@ -29,15 +31,16 @@ export default [
     input: "src/swiftype_app_search.js",
     output: [
       {
-        // Minified umd build
+        // Minified UMD build
         name: "SwiftypeAppSearch",
         file: "dist/swiftype_app_search.umd.min.js",
         format: "umd"
       }
     ],
     plugins: [
+      json(),
       babel({
-        exclude: "node_modules/**" // only transpile our source code
+        exclude: "node_modules/**"
       }),
       uglify()
     ]
diff --git a/src/client.js b/src/client.js
index d1b9954..2eb2757 100644
--- a/src/client.js
+++ b/src/client.js
@@ -1,7 +1,7 @@
 "use strict";
 
+import { version, name } from "../package.json";
 import ResultList from "./result_list";
-
 export default class Client {
   constructor(hostIdentifier, apiKey, engineName) {
     this.apiKey = apiKey;
@@ -75,9 +75,12 @@ export default class Client {
   }
 
   _request(path, params) {
+    debugger;
     const headers = new Headers({
       Authorization: `Bearer ${this.apiKey}`,
-      "Content-Type": "application/json"
+      "Content-Type": "application/json",
+      "X-Swiftype-Client": name,
+      "X-Swiftype-Client-Version": version
     });
 
     return fetch(`${this.apiEndpoint}${path}`, {
diff --git a/yarn.lock b/yarn.lock
index 772310a..990642a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1344,6 +1344,10 @@ estree-walker@^0.2.1:
   version "0.2.1"
   resolved "https://registry.yarnpkg.com/estree-walker/-/estree-walker-0.2.1.tgz#bdafe8095383d8414d5dc2ecf4c9173b6db9412e"
 
+estree-walker@^0.5.2:
+  version "0.5.2"
+  resolved "https://registry.yarnpkg.com/estree-walker/-/estree-walker-0.5.2.tgz#d3850be7529c9580d815600b53126515e146dd39"
+
 esutils@^2.0.2:
   version "2.0.2"
   resolved "https://registry.yarnpkg.com/esutils/-/esutils-2.0.2.tgz#0abf4f1caa5bcb1f7a9d8acc6dea4faaa04bac9b"
@@ -3412,6 +3416,12 @@ rollup-plugin-babel@^3.0.7:
   dependencies:
     rollup-pluginutils "^1.5.0"
 
+rollup-plugin-json@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/rollup-plugin-json/-/rollup-plugin-json-3.0.0.tgz#aeed2ff36e6c4fd0c60c4a8fc3d0884479e9dfce"
+  dependencies:
+    rollup-pluginutils "^2.2.0"
+
 rollup-plugin-uglify@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/rollup-plugin-uglify/-/rollup-plugin-uglify-4.0.0.tgz#6eb471738f1ce9ba7d9d4bc43b71cba02417c8fb"
@@ -3426,6 +3436,13 @@ rollup-pluginutils@^1.5.0:
     estree-walker "^0.2.1"
     minimatch "^3.0.2"
 
+rollup-pluginutils@^2.2.0:
+  version "2.3.0"
+  resolved "https://registry.yarnpkg.com/rollup-pluginutils/-/rollup-pluginutils-2.3.0.tgz#478ace04bd7f6da2e724356ca798214884738fc4"
+  dependencies:
+    estree-walker "^0.5.2"
+    micromatch "^2.3.11"
+
 rollup@^0.62.0:
   version "0.62.0"
   resolved "https://registry.yarnpkg.com/rollup/-/rollup-0.62.0.tgz#4ca8b3c9582195dc9341ff8a1375f58319b95bfc"