diff --git a/package.json b/package.json
index ea88a78..478417b 100644
--- a/package.json
+++ b/package.json
@@ -63,7 +63,7 @@
     "@sindresorhus/is": "^5.3.0",
     "ava": "^5.1.1",
     "bluebird": "^3.7.2",
-    "c8": "^7.12.0",
+    "c8": "^9.0.0",
     "chalk": "^4.1.2",
     "clone-deep": "^4.0.1",
     "color-json": "^3.0.2",