diff --git a/.github/workflows/update-casks.yml b/.github/workflows/update-casks.yml
index 86594348..b9fedcdd 100644
--- a/.github/workflows/update-casks.yml
+++ b/.github/workflows/update-casks.yml
@@ -18,6 +18,7 @@ jobs:
       - name: Checkout tap repository
         uses: actions/checkout@v2
         with:
+          ref: main
           path: tap
       - name: Symlink homebrew tap
         run: |
@@ -68,6 +69,7 @@ jobs:
       - name: Checkout tap repository main branch
         uses: actions/checkout@v2
         with:
+          ref: main
           path: tap
       - name: Symlink homebrew tap
         run: |