diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index 8c9dc571..b0ed6430 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -86,7 +86,7 @@ jobs:
             uv.lock
 
       - name: Cache virtual environment
-        uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5
+        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v5
         id: cache-venv
         with:
           path: .venv
@@ -101,7 +101,7 @@ jobs:
 
       - name: Cache cobaya_packages
         id: cache-cobaya
-        uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5
+        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v5
         with:
           path: ./cobaya_packages
           # Keyed on the MFLike version (which determines the downloaded data