diff --git a/package.json b/package.json
index e62f50a..828796c 100644
--- a/package.json
+++ b/package.json
@@ -50,7 +50,7 @@
     "istanbul": "^0.4.0",
     "magic-string": "^0.8.0",
     "mocha": "^2.3.3",
-    "remap-istanbul": "^0.3.1",
+    "remap-istanbul": "^0.4.0",
     "rollup": "^0.20.2",
     "rollup-plugin-babel": "^1.0.0",
     "rollup-plugin-npm": "^1.0.0",