diff --git a/package.json b/package.json
index 3009fe9..f166b47 100644
--- a/package.json
+++ b/package.json
@@ -34,9 +34,9 @@
     "which": "1.2.x"
   },
   "devDependencies": {
-    "assume": "1.3.x",
+    "assume": "1.4.x",
     "istanbul": "0.4.x",
-    "mocha": "2.3.x",
+    "mocha": "2.4.x",
     "pre-commit": "git://github.com/observing/pre-commit.git"
   }
 }