diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 1178f9c..8a32b9b 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -12,24 +12,24 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
         name: Checkout repository
         with:
           fetch-depth: 0
 
-      - uses: actions/cache@v3
+      - uses: actions/cache@6f8efc29b200d32929f49075959781ed54ec270c # v3.5.0
         name: Setup cache registry
         with:
           path: ~/.cargo/registry
           key: '${{ runner.os }}-cargo-registry-${{ hashFiles(''**/Cargo.lock'') }}'
 
-      - uses: actions/cache@v3
+      - uses: actions/cache@6f8efc29b200d32929f49075959781ed54ec270c # v3.5.0
         name: Setup cache index
         with:
           path: ~/.cargo/git
           key: '${{ runner.os }}-cargo-index-${{ hashFiles(''**/Cargo.lock'') }}'
 
-      - uses: actions/cache@v3
+      - uses: actions/cache@6f8efc29b200d32929f49075959781ed54ec270c # v3.5.0
         name: Setup cache build target
         with:
           path: target