diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b312010..ec6dfe3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,7 +15,7 @@ jobs:
       base_ref: ${{ github.base_ref || github.event.repository.default_branch || 'master' }}
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
         with:
           fetch-depth: 0
 
@@ -58,7 +58,7 @@ jobs:
   compile-deps:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
         with:
           fetch-depth: 0
 
@@ -75,7 +75,7 @@ jobs:
     needs: [compile-deps]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
         with:
           fetch-depth: 0
 
@@ -93,7 +93,7 @@ jobs:
     timeout-minutes: 1
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
         with:
           fetch-depth: 0
 
@@ -110,7 +110,7 @@ jobs:
     needs: [compile]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
         with:
           fetch-depth: 0
 
@@ -123,7 +123,7 @@ jobs:
     needs: [compile]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
         with:
           fetch-depth: 0
 
@@ -136,7 +136,7 @@ jobs:
     needs: [compile]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
         with:
           fetch-depth: 0
 
@@ -149,7 +149,7 @@ jobs:
     needs: [compile]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
         with:
           fetch-depth: 0