diff --git a/package.json b/package.json
index 26bafcb..232869a 100644
--- a/package.json
+++ b/package.json
@@ -18,13 +18,13 @@
   "devDependencies": {
     "coffee-script"       : "1.6.3",
     "coffee-coverage"     : "0.1.4",
-    "underscore"          : "1.5.1",
-    "mocha"               : "1.12.0",
+    "underscore"          : "1.5.2",
+    "mocha"               : "1.13.0",
     "sinon"               : "1.7.3",
-    "should"              : "1.2.2",
-    "coveralls"           : "2.0.16",
+    "should"              : "1.3.0",
+    "coveralls"           : "2.3.0",
     "mocha-lcov-reporter" : "0.0.1",
-    "browserify"          : "2.23.1"
+    "browserify"          : "2.24.0"
   },
   "author": "Kamil Backowski <kbackowski@gmail.com>",
   "license": "MIT",