diff --git a/package.json b/package.json
index b23d0b3..9121ab5 100644
--- a/package.json
+++ b/package.json
@@ -44,7 +44,7 @@
     "gulp-typescript": "^3.1.3",
     "merge2": "^1.0.2",
     "mocha": "^3.1.0",
-    "remap-istanbul": "^0.8.3",
+    "remap-istanbul": "^0.9.1",
     "rollup-plugin-node-resolve": "^2.0.0",
     "typescript": "^2.0.9"
   }