diff --git a/package.json b/package.json
index 3fc2818..c024cf2 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
   },
   "devDependencies": {
     "@types/jest": "^23.3.2",
-    "codecov": "3.1.0",
+    "codecov": "3.5.0",
     "husky": "2.7.0",
     "jest": "^23.5.0",
     "lint-staged": "9.2.1",
diff --git a/yarn.lock b/yarn.lock
index 3764e0b..905f55d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -90,6 +90,12 @@ acorn@^5.0.0, acorn@^5.5.3:
   version "5.7.1"
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.1.tgz#f095829297706a7c9776958c0afc8930a9b9d9d8"
 
+agent-base@^4.3.0:
+  version "4.3.0"
+  resolved "https://registry.yarnpkg.com/agent-base/-/agent-base-4.3.0.tgz#8165f01c436009bccad0b1d122f05ed770efc6ee"
+  dependencies:
+    es6-promisify "^5.0.0"
+
 ajv@^5.3.0:
   version "5.5.2"
   resolved "https://registry.yarnpkg.com/ajv/-/ajv-5.5.2.tgz#73b5eeca3fab653e3d3f9422b341ad42205dc965"
@@ -619,14 +625,14 @@ code-point-at@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/code-point-at/-/code-point-at-1.1.0.tgz#0d070b4d043a5bea33a2f1a40e2edb3d9a4ccf77"
 
-codecov@3.1.0:
-  version "3.1.0"
-  resolved "https://registry.yarnpkg.com/codecov/-/codecov-3.1.0.tgz#340bd968d361f256976b5af782dd8ba9f82bc849"
+codecov@3.5.0:
+  version "3.5.0"
+  resolved "https://registry.yarnpkg.com/codecov/-/codecov-3.5.0.tgz#3d0748932f9cb41e1ad7f21fa346ef1b2b1bed47"
   dependencies:
     argv "^0.0.2"
     ignore-walk "^3.0.1"
-    js-yaml "^3.12.0"
-    request "^2.87.0"
+    js-yaml "^3.13.1"
+    teeny-request "^3.11.3"
     urlgrey "^0.4.4"
 
 collection-visit@^1.0.0:
@@ -901,6 +907,16 @@ es-to-primitive@^1.1.1:
     is-date-object "^1.0.1"
     is-symbol "^1.0.1"
 
+es6-promise@^4.0.3:
+  version "4.2.8"
+  resolved "https://registry.yarnpkg.com/es6-promise/-/es6-promise-4.2.8.tgz#4eb21594c972bc40553d276e510539143db53e0a"
+
+es6-promisify@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/es6-promisify/-/es6-promisify-5.0.0.tgz#5109d62f3e56ea967c4b63505aef08291c8a5203"
+  dependencies:
+    es6-promise "^4.0.3"
+
 escape-string-regexp@^1.0.2, escape-string-regexp@^1.0.5:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz#1b61c0562190a8dff6ae3bb2cf0200ca130b86d4"
@@ -1440,6 +1456,13 @@ http-signature@~1.2.0:
     jsprim "^1.2.2"
     sshpk "^1.7.0"
 
+https-proxy-agent@^2.2.1:
+  version "2.2.2"
+  resolved "https://registry.yarnpkg.com/https-proxy-agent/-/https-proxy-agent-2.2.2.tgz#271ea8e90f836ac9f119daccd39c19ff7dfb0793"
+  dependencies:
+    agent-base "^4.3.0"
+    debug "^3.1.0"
+
 husky@2.7.0:
   version "2.7.0"
   resolved "https://registry.yarnpkg.com/husky/-/husky-2.7.0.tgz#c0a9a6a3b51146224e11bba0b46bba546e461d05"
@@ -2138,14 +2161,7 @@ js-tokens@^3.0.0, js-tokens@^3.0.2:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-4.0.0.tgz#19203fb59991df98e3a287050d4647cdeaf32499"
 
-js-yaml@^3.12.0, js-yaml@^3.7.0:
-  version "3.12.0"
-  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.12.0.tgz#eaed656ec8344f10f527c6bfa1b6e2244de167d1"
-  dependencies:
-    argparse "^1.0.7"
-    esprima "^4.0.0"
-
-js-yaml@^3.13.1:
+js-yaml@^3.13.1, js-yaml@^3.7.0:
   version "3.13.1"
   resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.13.1.tgz#aff151b30bfdfa8e49e05da22e7415e9dfa37847"
   dependencies:
@@ -2601,6 +2617,10 @@ nice-try@^1.0.4:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/nice-try/-/nice-try-1.0.5.tgz#a3378a7696ce7d223e88fc9b764bd7ef1089e366"
 
+node-fetch@^2.2.0:
+  version "2.6.0"
+  resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-2.6.0.tgz#e633456386d4aa55863f676a7ab0daa8fdecb0fd"
+
 node-int64@^0.4.0:
   version "0.4.0"
   resolved "https://registry.yarnpkg.com/node-int64/-/node-int64-0.4.0.tgz#87a9065cdb355d3182d8f94ce11188b825c68a3b"
@@ -3605,6 +3625,14 @@ tar@^4:
     safe-buffer "^5.1.2"
     yallist "^3.0.2"
 
+teeny-request@^3.11.3:
+  version "3.11.3"
+  resolved "https://registry.yarnpkg.com/teeny-request/-/teeny-request-3.11.3.tgz#335c629f7645e5d6599362df2f3230c4cbc23a55"
+  dependencies:
+    https-proxy-agent "^2.2.1"
+    node-fetch "^2.2.0"
+    uuid "^3.3.2"
+
 test-exclude@^4.2.1:
   version "4.2.1"
   resolved "https://registry.yarnpkg.com/test-exclude/-/test-exclude-4.2.1.tgz#dfa222f03480bca69207ca728b37d74b45f724fa"