diff --git a/package.json b/package.json
index cc03d23..aefeff0 100644
--- a/package.json
+++ b/package.json
@@ -16,9 +16,9 @@
     "negotiator": "0.4.2"
   },
   "devDependencies": {
-    "connect": "^2.13.0",
-    "mocha": "^1.17.0",
-    "should": "^3.0.0",
+    "connect": ">= 2.13.0 < 3",
+    "mocha": ">= 1.17.0 < 2",
+    "should": ">= 3.0.0 < 4",
     "supertest": "~0.9.0"
   },
   "engines": {