diff --git a/package.json b/package.json
index 946f0b1..6dc7d92 100644
--- a/package.json
+++ b/package.json
@@ -78,7 +78,7 @@
     "babel-plugin-transform-remove-console": "6.9.4",
     "babel-plugin-unassert": "3.1.0",
     "babel-preset-power-assert": "3.0.0",
-    "c8": "7.7.2",
+    "c8": "7.7.3",
     "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 dbd6798..95e26ee 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3142,10 +3142,10 @@ builtins@^1.0.3:
   resolved "https://registry.yarnpkg.com/builtins/-/builtins-1.0.3.tgz#cb94faeb61c8696451db36534e1422f94f0aee88"
   integrity sha1-y5T662HIaWRR2zZTThQi+U8K7og=
 
-c8@7.7.2:
-  version "7.7.2"
-  resolved "https://registry.yarnpkg.com/c8/-/c8-7.7.2.tgz#30ff37b8125d96cab3eb065895a0b68dbc495a0f"
-  integrity sha512-8AqNnUMxB3hsgYCYso2GJjlwnaNPlrEEbYbCQb7N76V1nrOgCKXiTcE3gXU18rIj0FeduPywROrIBMC7XAKApg==
+c8@7.7.3:
+  version "7.7.3"
+  resolved "https://registry.yarnpkg.com/c8/-/c8-7.7.3.tgz#5af8f83b55dace03b353375e7a2ba85e2c13b17f"
+  integrity sha512-ZyA7n3w8i4ETV25tVYMHwJxCSnaOf/LfA8vOcuZOPbonuQfD7tBT/gMWZy7eczRpCDuHcvMXwoqAemg6R0p3+A==
   dependencies:
     "@bcoe/v8-coverage" "^0.2.3"
     "@istanbuljs/schema" "^0.1.2"
@@ -3156,7 +3156,7 @@ c8@7.7.2:
     istanbul-reports "^3.0.2"
     rimraf "^3.0.0"
     test-exclude "^6.0.0"
-    v8-to-istanbul "^7.1.0"
+    v8-to-istanbul "^8.0.0"
     yargs "^16.2.0"
     yargs-parser "^20.2.7"
 
@@ -10561,10 +10561,10 @@ v8-compile-cache@^2.0.3:
   resolved "https://registry.yarnpkg.com/v8-compile-cache/-/v8-compile-cache-2.3.0.tgz#2de19618c66dc247dcfb6f99338035d8245a2cee"
   integrity sha512-l8lCEmLcLYZh4nbunNZvQCJc5pv7+RCwa8q/LdUx8u7lsWvPDKmpodJAJNwkAhJC//dFY48KuIEmjtd4RViDrA==
 
-v8-to-istanbul@^7.1.0:
-  version "7.1.2"
-  resolved "https://registry.yarnpkg.com/v8-to-istanbul/-/v8-to-istanbul-7.1.2.tgz#30898d1a7fa0c84d225a2c1434fb958f290883c1"
-  integrity sha512-TxNb7YEUwkLXCQYeudi6lgQ/SZrzNO4kMdlqVxaZPUIUjCv6iSSypUQX70kNBSERpQ8fk48+d61FXk+tgqcWow==
+v8-to-istanbul@^8.0.0:
+  version "8.0.0"
+  resolved "https://registry.yarnpkg.com/v8-to-istanbul/-/v8-to-istanbul-8.0.0.tgz#4229f2a99e367f3f018fa1d5c2b8ec684667c69c"
+  integrity sha512-LkmXi8UUNxnCC+JlH7/fsfsKr5AU110l+SYGJimWNkWhxbN5EyeOtm1MJ0hhvqMMOhGwBj1Fp70Yv9i+hX0QAg==
   dependencies:
     "@types/istanbul-lib-coverage" "^2.0.1"
     convert-source-map "^1.6.0"