diff --git a/package.json b/package.json
index abb8185f207411bc490b76e3b55fd744bf5ea3ac..a3fc1bac7aa7653c0e4a2b456db6cf69df6a2356 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,7 @@
   "name": "decentraleyes",
   "id": "id1-BoFifL9Vbdl2zQ@jetpack",
   "engines": {
-    "firefox": ">=21.0",
-    "fennec": ">=21.0"
+    "firefox": ">=38.0a1",
+    "fennec": ">=38.0a1"
   }
 }