diff --git a/package.json b/package.json
index ffb8541..2def9ee 100644
--- a/package.json
+++ b/package.json
@@ -21,6 +21,8 @@
     "gulp-plumber": "^1.1.0",
     "gulp-watch": "^4.3.10",
     "sinon": "^1.17.6",
-    "sinon-chai": "^2.8.0"
+    "sinon-chai": "^2.8.0",
+    "c-preprocessor": "^0.0.0",
+    "gulp-c-preprocessor": "^0.0.0"
   }
 }