diff --git a/.github/workflows/swift.yml b/.github/workflows/swift.yml
index 73526317..466bb120 100644
--- a/.github/workflows/swift.yml
+++ b/.github/workflows/swift.yml
@@ -15,12 +15,12 @@ jobs:
       image: vapor/swift:5.1-xenial
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@master
+    - uses: actions/checkout@v1.2.0
     - run: swift test
   bionic:
     container: 
       image: vapor/swift:5.1-bionic
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@master
+    - uses: actions/checkout@v1.2.0
     - run: swift test