diff --git a/package.json b/package.json
index c9a1017..5dbb4b3 100644
--- a/package.json
+++ b/package.json
@@ -28,5 +28,9 @@
   "bugs": {
     "url": "https://github.com/Daplie/node-letsencrypt/issues"
   },
-  "homepage": "https://github.com/Daplie/node-letsencrypt#readme"
+  "homepage": "https://github.com/Daplie/node-letsencrypt#readme",
+  "devDependencies": {
+    "express": "^4.13.3",
+    "localhost.daplie.com-certificates": "^1.1.2"
+  }
 }