diff --git a/package.json b/package.json
index 53840b0..7cd9799 100644
--- a/package.json
+++ b/package.json
@@ -88,7 +88,7 @@
     "babel-plugin-transform-remove-console": "6.9.4",
     "babel-plugin-unassert": "3.2.0",
     "babel-preset-power-assert": "3.0.0",
-    "c8": "7.14.0",
+    "c8": "8.0.0",
     "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 9dce5f2..5ef6c14 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3258,10 +3258,10 @@ bundle-name@^3.0.0:
   dependencies:
     run-applescript "^5.0.0"
 
-c8@7.14.0:
-  version "7.14.0"
-  resolved "https://registry.yarnpkg.com/c8/-/c8-7.14.0.tgz#f368184c73b125a80565e9ab2396ff0be4d732f3"
-  integrity sha512-i04rtkkcNcCf7zsQcSv/T9EbUn4RXQ6mropeMcjFOsQXQ0iGLAr/xT6TImQg4+U9hmNpN9XdvPkjUL1IzbgxJw==
+c8@8.0.0:
+  version "8.0.0"
+  resolved "https://registry.yarnpkg.com/c8/-/c8-8.0.0.tgz#99c7408fbbafaa5630ddc80881adbfe461fc6c8f"
+  integrity sha512-XHA5vSfCLglAc0Xt8eLBZMv19lgiBSjnb1FLAQgnwkuhJYEonpilhEB4Ea3jPAbm0FhD6VVJrc0z73jPe7JyGQ==
   dependencies:
     "@bcoe/v8-coverage" "^0.2.3"
     "@istanbuljs/schema" "^0.1.3"