diff --git a/package.json b/package.json
index b4111dc3f..86a88216b 100644
--- a/package.json
+++ b/package.json
@@ -29,8 +29,10 @@
     "blanket": {
       "pattern": "specified in test/unit/coverage.js"
     },
-    "default_api_branch": "6.2",
+    "default_api_branch": "6.3",
     "supported_es_branches": [
+      "6.3",
+      "6.3",
       "6.2",
       "6.1",
       "6.0",