diff --git a/package.json b/package.json
index 4613b42..eaf22ac 100644
--- a/package.json
+++ b/package.json
@@ -29,11 +29,11 @@
     "underscore": "1.x.x"
   },
   "devDependencies": {
-    "coffee-script": "^1.9.3",
+    "coffee-script": "^1.10.0",
     "fs-extra": "^0.18.4",
-    "mocha": "^2.2.5",
-    "should": "~7.0.2",
-    "sinon": "^1.15.4"
+    "mocha": "^2.3.3",
+    "should": "~7.1.0",
+    "sinon": "^1.17.1"
   },
   "engines": {
     "node": "> 0.4.1"