diff --git a/package.json b/package.json
index cf5442d..7fc9b02 100644
--- a/package.json
+++ b/package.json
@@ -86,7 +86,6 @@
     "babel-plugin-unassert": "3.1.0",
     "babel-preset-power-assert": "3.0.0",
     "c8": "7.7.3",
-    "coveralls": "3.1.1",
     "esdoc": "1.1.0",
     "esdoc-ecmascript-proposal-plugin": "1.0.0",
     "esdoc-inject-script-plugin": "1.0.0",
diff --git a/yarn.lock b/yarn.lock
index f23083c..9efe889 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3338,17 +3338,6 @@ cosmiconfig@^7.0.0:
     path-type "^4.0.0"
     yaml "^1.10.0"
 
-coveralls@3.1.1:
-  version "3.1.1"
-  resolved "https://registry.yarnpkg.com/coveralls/-/coveralls-3.1.1.tgz#f5d4431d8b5ae69c5079c8f8ca00d64ac77cf081"
-  integrity sha512-+dxnG2NHncSD1NrqbSM3dn/lE57O6Qf/koe9+I7c+wzkqRmEvcp0kgJdxKInzYzkICKkFMZsX3Vct3++tsF9ww==
-  dependencies:
-    js-yaml "^3.13.1"
-    lcov-parse "^1.0.0"
-    log-driver "^1.2.7"
-    minimist "^1.2.5"
-    request "^2.88.2"
-
 create-ecdh@^4.0.0:
   version "4.0.4"
   resolved "https://registry.yarnpkg.com/create-ecdh/-/create-ecdh-4.0.4.tgz#d6e7f4bffa66736085a0762fd3a632684dabcc4e"
@@ -6470,11 +6459,6 @@ latest-version@^5.1.0:
   dependencies:
     package-json "^6.3.0"
 
-lcov-parse@^1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/lcov-parse/-/lcov-parse-1.0.0.tgz#eb0d46b54111ebc561acb4c408ef9363bdc8f7e0"
-  integrity sha1-6w1GtUER68VhrLTECO+TY73I9+A=
-
 levn@^0.4.1:
   version "0.4.1"
   resolved "https://registry.yarnpkg.com/levn/-/levn-0.4.1.tgz#ae4562c007473b932a6200d403268dd2fffc6ade"
@@ -6763,11 +6747,6 @@ lodash@^4.1.0, lodash@^4.13.1, lodash@^4.15.0, lodash@^4.17.12, lodash@^4.17.15,
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
   integrity sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==
 
-log-driver@^1.2.7:
-  version "1.2.7"
-  resolved "https://registry.yarnpkg.com/log-driver/-/log-driver-1.2.7.tgz#63b95021f0702fedfa2c9bb0a24e7797d71871d8"
-  integrity sha512-U7KCmLdqsGHBLeWqYlFA0V0Sl6P08EE1ZrmA9cxjUE0WVqT9qnyVDPz1kzpFEP0jdJuFnasWIfSd7fsaNXkpbg==
-
 log-symbols@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/log-symbols/-/log-symbols-1.0.2.tgz#376ff7b58ea3086a0f09facc74617eca501e1a18"
@@ -8806,7 +8785,7 @@ repeating@^2.0.0:
   dependencies:
     is-finite "^1.0.0"
 
-request@^2.55.0, request@^2.88.2:
+request@^2.55.0:
   version "2.88.2"
   resolved "https://registry.yarnpkg.com/request/-/request-2.88.2.tgz#d73c918731cb5a87da047e207234146f664d12b3"
   integrity sha512-MsvtOrfG9ZcrOwAW+Qi+F6HbD0CWXEh9ou77uOb7FM2WPhwT7smM833PzanhJLsgXjN89Ir6V2PczXNnMpwKhw==