diff --git a/package.json b/package.json
index c1b7cd7..468273e 100644
--- a/package.json
+++ b/package.json
@@ -46,6 +46,7 @@
     "common-tags": "^1.8.0",
     "cross-fetch": "^3.0.4",
     "debug": "^4.1.1",
+    "defaults-deep": "^0.2.4",
     "qs": "^6.8.0",
     "url-join": "^4.0.1",
     "url-parse": "^1.4.7"
diff --git a/src/index.js b/src/index.js
index d86cdee..6d35b68 100644
--- a/src/index.js
+++ b/src/index.js
@@ -4,6 +4,7 @@ const urlJoin = require('url-join');
 const URL = require('url-parse');
 const debug = require('debug')('frisbee');
 const boolean = require('boolean');
+const defaults = require('defaults-deep');
 
 // eslint-disable-next-line import/no-unassigned-import
 require('cross-fetch/polyfill');
@@ -94,28 +95,30 @@ function createFrisbeeResponse(origResp) {
 
 class Frisbee {
   constructor(opts = {}) {
-    this.opts = {
-      parse: {
-        ignoreQueryPrefix: true
-      },
-      stringify: {
-        addQueryPrefix: true,
-        format: 'RFC1738',
-        arrayFormat: 'indices'
+    this.opts = defaults(
+      {
+        preventBodyOnMethods: ['GET', 'HEAD', 'DELETE', 'CONNECT'],
+        interceptableMethods: METHODS,
+        mode: 'same-origin',
+        cache: 'default',
+        credentials: 'same-origin',
+        redirect: 'follow',
+        referrer: 'client',
+        body: null,
+        params: null,
+        logRequest: false,
+        logResponse: false,
+        parse: {
+          ignoreQueryPrefix: true
+        },
+        stringify: {
+          addQueryPrefix: true,
+          format: 'RFC1738',
+          arrayFormat: 'indices'
+        }
       },
-      preventBodyOnMethods: ['GET', 'HEAD', 'DELETE', 'CONNECT'],
-      interceptableMethods: METHODS,
-      mode: 'same-origin',
-      cache: 'default',
-      credentials: 'same-origin',
-      redirect: 'follow',
-      referrer: 'client',
-      body: null,
-      params: null,
-      logRequest: false,
-      logResponse: false,
-      ...opts
-    };
+      opts
+    );
 
     let localAbortController;
     Object.defineProperty(this, 'abortController', {
diff --git a/yarn.lock b/yarn.lock
index 34af631..c1434e1 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2863,6 +2863,15 @@ default-require-extensions@^2.0.0:
   dependencies:
     strip-bom "^3.0.0"
 
+defaults-deep@^0.2.4:
+  version "0.2.4"
+  resolved "https://registry.yarnpkg.com/defaults-deep/-/defaults-deep-0.2.4.tgz#a479cfeafce025810fb93aa8d2dde0ee2d677cc6"
+  integrity sha512-V6BtqzcMvn0EPOy7f+SfMhfmTawq+7UQdt9yZH0EBK89+IHo5f+Hse/qzTorAXOBrQpxpwb6cB/8OgtaMrT+Fg==
+  dependencies:
+    for-own "^0.1.3"
+    is-extendable "^0.1.1"
+    lazy-cache "^0.2.3"
+
 defaults@^1.0.3:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/defaults/-/defaults-1.0.3.tgz#c656051e9817d9ff08ed881477f3fe4019f3ef7d"
@@ -4141,11 +4150,18 @@ fn-name@^2.0.1:
   resolved "https://registry.yarnpkg.com/fn-name/-/fn-name-2.0.1.tgz#5214d7537a4d06a4a301c0cc262feb84188002e7"
   integrity sha1-UhTXU3pNBqSjAcDMJi/rhBiAAuc=
 
-for-in@^1.0.2:
+for-in@^1.0.1, for-in@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/for-in/-/for-in-1.0.2.tgz#81068d295a8142ec0ac726c6e2200c30fb6d5e80"
   integrity sha1-gQaNKVqBQuwKxybG4iAMMPttXoA=
 
+for-own@^0.1.3:
+  version "0.1.5"
+  resolved "https://registry.yarnpkg.com/for-own/-/for-own-0.1.5.tgz#5265c681a4f294dabbf17c9509b6763aa84510ce"
+  integrity sha1-UmXGgaTylNq78XyVCbZ2OqhFEM4=
+  dependencies:
+    for-in "^1.0.1"
+
 foreach@^2.0.5:
   version "2.0.5"
   resolved "https://registry.yarnpkg.com/foreach/-/foreach-2.0.5.tgz#0bee005018aeb260d0a3af3ae658dd0136ec1b99"
@@ -5601,6 +5617,11 @@ latest-version@^5.0.0:
   dependencies:
     package-json "^6.3.0"
 
+lazy-cache@^0.2.3:
+  version "0.2.7"
+  resolved "https://registry.yarnpkg.com/lazy-cache/-/lazy-cache-0.2.7.tgz#7feddf2dcb6edb77d11ef1d117ab5ffdf0ab1b65"
+  integrity sha1-f+3fLctu23fRHvHRF6tf/fCrG2U=
+
 levenshtein-edit-distance@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/levenshtein-edit-distance/-/levenshtein-edit-distance-1.0.0.tgz#895baf478cce8b5c1a0d27e45d7c1d978a661e49"