diff --git a/package.json b/package.json
index 19a0ebd..c22d9bd 100644
--- a/package.json
+++ b/package.json
@@ -29,11 +29,11 @@
     "underscore": "1.x.x"
   },
   "devDependencies": {
-    "coffee-script": "^1.10.0",
-    "fs-extra": "^0.18.4",
-    "mocha": "^2.3.3",
-    "should": "~7.1.0",
-    "sinon": "^1.17.1"
+    "coffee-script": "^1.12.7",
+    "fs-extra": "^4.0.2",
+    "mocha": "^4.0.1",
+    "should": "^13.1.3",
+    "sinon": "^2.4.1"
   },
   "engines": {
     "node": "> 0.4.1"