diff --git a/package.json b/package.json
index 007d739..b249162 100644
--- a/package.json
+++ b/package.json
@@ -74,7 +74,7 @@
     "babel-plugin-unassert": "3.1.0",
     "babel-preset-power-assert": "3.0.0",
     "c8": "7.7.3",
-    "coveralls": "3.1.0",
+    "coveralls": "3.1.1",
     "esdoc": "1.1.0",
     "esdoc-inject-script-plugin": "1.0.0",
     "esdoc-inject-style-plugin": "1.0.0",
diff --git a/yarn.lock b/yarn.lock
index 3519e71..398a6e8 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3780,10 +3780,10 @@ cosmiconfig@^7.0.0:
     path-type "^4.0.0"
     yaml "^1.10.0"
 
-coveralls@3.1.0:
-  version "3.1.0"
-  resolved "https://registry.yarnpkg.com/coveralls/-/coveralls-3.1.0.tgz#13c754d5e7a2dd8b44fe5269e21ca394fb4d615b"
-  integrity sha512-sHxOu2ELzW8/NC1UP5XVLbZDzO4S3VxfFye3XYCznopHy02YjNkHcj5bKaVw2O7hVaBdBjEdQGpie4II1mWhuQ==
+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"