diff --git a/package.json b/package.json
index f013cbd..d81e686 100644
--- a/package.json
+++ b/package.json
@@ -25,10 +25,12 @@
   },
   "license": "MIT",
   "dependencies": {
-    "csso": "^1.3.11",
-    "clean-css": "^2.2.12",
-    "cssshrink": "0.0.5",
-    "colors": "^0.6.2"
+    "csso": "1.3.11",
+    "clean-css": "2.2.12",
+    "cssshrink": "0.0.5"
+  },
+  "devDependencies": {
+    "colors": "0.6.2"
   },
   "engines": {
     "node": ">=0.8.0",