diff --git a/.github/workflows/deploy_master.yml b/.github/workflows/deploy_master.yml
index fca71bc2..90215947 100644
--- a/.github/workflows/deploy_master.yml
+++ b/.github/workflows/deploy_master.yml
@@ -14,7 +14,7 @@ jobs:
       registry-paths: ${{ steps.push-to-quay.outputs.registry-paths }}
 
     steps:
-      - uses: actions/checkout@master
+      - uses: actions/checkout@main
 
       - name: reconfigure git to use HTTP authentication
         run: >
diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
index 7a3555dc..a6e3d7e0 100644
--- a/.github/workflows/pull-request.yml
+++ b/.github/workflows/pull-request.yml
@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-20.04
 
     steps:
-      - uses: actions/checkout@master
+      - uses: actions/checkout@main
 
       - name: Reconfigure git to use HTTP authentication
         run: >