diff --git a/package.json b/package.json
index e56d372..55cacee 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
   },
   "devDependencies": {
     "ava": "^8.0.1",
-    "c8": "^11.0.0",
+    "c8": "^12.0.0",
     "documentation": "^14.0.3",
     "esm": "^3.2.25",
     "loglevel-mixin": "^7.2.11",