diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index e75c04d..9096ae1 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -31,14 +31,14 @@ jobs:
     # have already built the testbed. Any small file will do
     - id: cache-key
       name: Retrieve cache key
-      uses: actions/cache@0c45773b623bea8c8e75f6c82b208c3cf94ea4f9 # v4
+      uses: actions/cache@3624ceb22c1c5a301c8db4169662070a689d9ea8 # v4
       with:
         path: ./LICENSE
         key: key-${{ matrix.os }}-${{ hashFiles('testbed') }}
     - id: cache
       name: Retrieve or create the conda cache
       if: steps.cache-key.outputs.cache-hit != 'true'
-      uses: actions/cache@0c45773b623bea8c8e75f6c82b208c3cf94ea4f9 # v4
+      uses: actions/cache@3624ceb22c1c5a301c8db4169662070a689d9ea8 # v4
       with:
         path: ${{ steps.conda-root.outputs.value }}
         key: testbed-${{ matrix.os }}-${{ hashFiles('testbed') }}
@@ -94,7 +94,7 @@ jobs:
         name: package-${{ github.sha }}
         path: conda-bld
     - name: Retrieve the testbed
-      uses: actions/cache@0c45773b623bea8c8e75f6c82b208c3cf94ea4f9 # v4
+      uses: actions/cache@3624ceb22c1c5a301c8db4169662070a689d9ea8 # v4
       with:
         path: ${{ steps.conda-root.outputs.value }}
         key: testbed-${{ matrix.os }}-${{ hashFiles('testbed') }}