diff --git a/package.json b/package.json
index 6af1e8e..45893d8 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,7 @@
     }
   ],
   "devDependencies": {
-    "deepmerge": "^0.2.10",
+    "deepmerge": "^1.0.0",
     "eslint": "^2.13.1",
     "eslint-config-prototypers": "^0.2.0",
     "mocha": "^2.2.4",