diff --git a/package.json b/package.json
index 11293308e..a5e49aed6 100644
--- a/package.json
+++ b/package.json
@@ -120,7 +120,7 @@
     "semver": "^5.0.3"
   },
   "optionalDependencies": {
-    "firmata": "latest"
+    "firmata": "git://github.com/jgautier/firmata.git"
   },
   "devDependencies": {
     "async": "~0.9.0",