diff --git a/package.json b/package.json
index 2833a69..022b2b3 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
   "devDependencies": {
     "@types/fetch-mock": "7.3.2",
     "@types/jest": "24.9.1",
-    "fetch-mock": "7.7.3",
+    "fetch-mock": "9.10.6",
     "jest": "24.9.0",
     "rimraf": "2.7.1",
     "semantic-release": "15.14.0",
diff --git a/yarn.lock b/yarn.lock
index 0aadc35..7169ce2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -878,15 +878,6 @@ babel-plugin-jest-hoist@^24.9.0:
   dependencies:
     "@types/babel__traverse" "^7.0.6"
 
-babel-polyfill@^6.26.0:
-  version "6.26.0"
-  resolved "https://registry.yarnpkg.com/babel-polyfill/-/babel-polyfill-6.26.0.tgz#379937abc67d7895970adc621f284cd966cf2153"
-  integrity sha1-N5k3q8Z9eJWXCtxiHyhM2WbPIVM=
-  dependencies:
-    babel-runtime "^6.26.0"
-    core-js "^2.5.0"
-    regenerator-runtime "^0.10.5"
-
 babel-preset-jest@^24.9.0:
   version "24.9.0"
   resolved "https://registry.yarnpkg.com/babel-preset-jest/-/babel-preset-jest-24.9.0.tgz#192b521e2217fb1d1f67cf73f70c336650ad3cdc"
@@ -1532,15 +1523,15 @@ copy-descriptor@^0.1.0:
   resolved "https://registry.yarnpkg.com/copy-descriptor/-/copy-descriptor-0.1.1.tgz#676f6eb3c39997c2ee1ac3a924fd6124748f578d"
   integrity sha1-Z29us8OZl8LuGsOpJP1hJHSPV40=
 
-core-js@^2.4.0, core-js@^2.5.0:
+core-js@^2.4.0:
   version "2.5.7"
   resolved "https://registry.yarnpkg.com/core-js/-/core-js-2.5.7.tgz#f972608ff0cead68b841a16a932d0b183791814e"
   integrity sha512-RszJCAxg/PP6uzXVXL6BsxSXx/B05oJAQ2vkJRjyjrEcNVycaqOmNb5OTxZPE3xa5gwZduqza6L9JOCenh/Ecw==
 
-core-js@^2.6.9:
-  version "2.6.9"
-  resolved "https://registry.yarnpkg.com/core-js/-/core-js-2.6.9.tgz#6b4b214620c834152e179323727fc19741b084f2"
-  integrity sha512-HOpZf6eXmnl7la+cUdMnLvUxKNqLUzJvgIziQ0DiF3JwSImNphIqdGqzj6hIKyX04MmV0poclQ7+wjWvxQyR2A==
+core-js@^3.0.0:
+  version "3.6.5"
+  resolved "https://registry.yarnpkg.com/core-js/-/core-js-3.6.5.tgz#7395dc273af37fb2e50e9bd3d9fe841285231d1a"
+  integrity sha512-vZVEEwZoIsI+vPEuoF9Iqf5H7/M3eeQqWlQnYa8FSKKePuYTf5MWnxb5SDAzCa60b3JBRS5g9b+Dq7b1y/RCrA==
 
 core-util-is@1.0.2, core-util-is@~1.0.0:
   version "1.0.2"
@@ -2143,16 +2134,19 @@ fb-watchman@^2.0.0:
   dependencies:
     bser "^2.0.0"
 
-fetch-mock@7.7.3:
-  version "7.7.3"
-  resolved "https://registry.yarnpkg.com/fetch-mock/-/fetch-mock-7.7.3.tgz#6a3f94cfed6e423ab7f5464912982030da605335"
-  integrity sha512-I4OkK90JFQnjH8/n3HDtWxH/I6D1wrxoAM2ri+nb444jpuH3RTcgvXx2el+G20KO873W727/66T7QhOvFxNHPg==
+fetch-mock@9.10.6:
+  version "9.10.6"
+  resolved "https://registry.yarnpkg.com/fetch-mock/-/fetch-mock-9.10.6.tgz#62c646dbb0c91573e14c9dca3c92b6e6e71c60f1"
+  integrity sha512-kqAV3C8KNmNZcY87e2yP4qBbRD1H4i0Cndw0bKmXNBItuEdTfCmDlDdIGviFbS5bqp0pS9GZ721aAQud+zRmJQ==
   dependencies:
-    babel-polyfill "^6.26.0"
-    core-js "^2.6.9"
+    babel-runtime "^6.26.0"
+    core-js "^3.0.0"
+    debug "^4.1.1"
     glob-to-regexp "^0.4.0"
+    is-subset "^0.1.1"
     lodash.isequal "^4.5.0"
     path-to-regexp "^2.2.1"
+    querystring "^0.2.0"
     whatwg-url "^6.5.0"
 
 figgy-pudding@^3.0.0, figgy-pudding@^3.1.0, figgy-pudding@^3.2.0:
@@ -5377,6 +5371,11 @@ query-string@^6.1.0:
     decode-uri-component "^0.2.0"
     strict-uri-encode "^2.0.0"
 
+querystring@^0.2.0:
+  version "0.2.0"
+  resolved "https://registry.yarnpkg.com/querystring/-/querystring-0.2.0.tgz#b209849203bb25df820da756e747005878521620"
+  integrity sha1-sgmEkgO7Jd+CDadW50cAWHhSFiA=
+
 quick-lru@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/quick-lru/-/quick-lru-1.1.0.tgz#4360b17c61136ad38078397ff11416e186dcfbb8"
@@ -5561,11 +5560,6 @@ redeyed@~2.1.0:
   dependencies:
     esprima "~4.0.0"
 
-regenerator-runtime@^0.10.5:
-  version "0.10.5"
-  resolved "https://registry.yarnpkg.com/regenerator-runtime/-/regenerator-runtime-0.10.5.tgz#336c3efc1220adcedda2c9fab67b5a7955a33658"
-  integrity sha1-M2w+/BIgrc7dosn6tntaeVWjNlg=
-
 regenerator-runtime@^0.11.0:
   version "0.11.1"
   resolved "https://registry.yarnpkg.com/regenerator-runtime/-/regenerator-runtime-0.11.1.tgz#be05ad7f9bf7d22e056f9726cee5017fbf19e2e9"