diff --git a/package.json b/package.json
index c2fb628..1bd7165 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
     "eslint": "^4.8.0",
     "eslint-config-google": "^0.9.1",
     "mocha": "^4.0.1",
-    "nyc": "^11.2.1"
+    "nyc": "^13.2.0"
   },
   "dependencies": {
     "fs-extra": "^4.0.2",