diff --git a/package.json b/package.json
index 25991d3..f178392 100644
--- a/package.json
+++ b/package.json
@@ -54,9 +54,9 @@
     "istanbul": "^0.3.20",
     "magic-string": "^0.7.0",
     "mocha": "^2.2.4",
-    "remap-istanbul": "^0.2.0",
+    "remap-istanbul": "^0.3.0",
     "sander": "^0.3.3",
-    "source-map": "^0.4.4"
+    "source-map": "^0.5.1"
   },
   "dependencies": {
     "minimist": "^1.1.1",