Update package.json

Author: youtakanke

package.json

@@ -10,7 +10,7 @@
   ],
   "version": "0.1.7",
   "dependencies": {
-    "formidable": "^1.2.2",
+    "formidable": "1.2.2",
     "imagemagick": ">=0.1.2",
     "lodash": ">= 0.9.2",
     "mkdirp": ">= 0.3.4",