diff --git a/package.json b/package.json
index 00b8a5c..edec1a5 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,7 @@
     "babel-preset-power-assert": "^1.0.0",
     "babel-register": "^6.9.0",
     "chokidar-cli": "^1.2.0",
-    "codecov": "^1.0.1",
+    "codecov": "^3.7.1",
     "eslint": "^3.10.0",
     "eslint-config-mysticatea": "^7.0.1",
     "mocha": "^3.0.2",