diff --git a/package.json b/package.json
index 1a5316a17..b44d4abd2 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,6 @@
     },
     "default_api_branch": "6.3",
     "supported_es_branches": [
-      "6.3",
       "6.3",
       "6.2",
       "6.1",