diff --git a/package.json b/package.json
index 5e9294b..e686b85 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
     "@babel/core": "^7.0.0",
     "@babel/preset-env": "^7.0.0",
     "@babel/register": "^7.0.0",
-    "babel-plugin-istanbul": "^4.1.6",
+    "babel-plugin-istanbul": "^5.1.1",
     "chai": "^4.1.2",
     "cross-env": "^5.1.3",
     "eslint": "^5.3.0",