diff --git a/package.json b/package.json
index 11f4fdf..f07d23c 100644
--- a/package.json
+++ b/package.json
@@ -48,7 +48,7 @@
   "devDependencies": {
     "babel-cli": "^6.18.0",
     "babel-eslint": "^8.0.0",
-    "babel-plugin-istanbul": "^4.1.1",
+    "babel-plugin-istanbul": "^5.1.3",
     "babel-plugin-transform-flow-strip-types": "^6.21.0",
     "babel-preset-env": "^1.1.8",
     "babel-register": "^6.18.0",