diff --git a/package.json b/package.json
index c89dc439..e046c7b3 100644
--- a/package.json
+++ b/package.json
@@ -67,7 +67,6 @@
   },
   "devDependencies": {
     "@std/esm": "~0.22.0",
-    "c8": "^2.0.0",
     "chai": "^4.1.2",
     "codecov": "^3.0.0",
     "eslint": "^4.7.2",