diff --git a/.github/workflows/Build_External_Rock.yaml b/.github/workflows/Build_External_Rock.yaml
index cf9a0ab..0277a37 100644
--- a/.github/workflows/Build_External_Rock.yaml
+++ b/.github/workflows/Build_External_Rock.yaml
@@ -8,7 +8,7 @@ on:
 
 jobs:
     build:
-        uses: canonical/oci-factory/.github/workflows/Build-Rock.yaml
+        uses: canonical/oci-factory/.github/workflows/Build-Rock.yaml@main
         with:
             oci-archive-name: "external_mock-rock"
             rock-repo: canonical/rocks-toolbox