diff --git a/build/fbcode_builder/getdeps.py b/build/fbcode_builder/getdeps.py
index 6120209c0..0de6dca19 100755
--- a/build/fbcode_builder/getdeps.py
+++ b/build/fbcode_builder/getdeps.py
@@ -956,7 +956,7 @@ jobs:
         )
         parser.add_argument(
             "--main-branch",
-            default="master",
+            default="main",
             help="Main branch to trigger GitHub Action on",
         )