diff --git a/.github/workflows/cicd.yaml b/.github/workflows/cicd.yaml
index 6f0aa62..d3acb1b 100644
--- a/.github/workflows/cicd.yaml
+++ b/.github/workflows/cicd.yaml
@@ -37,7 +37,10 @@ jobs:
       uses: actions/cache/restore@v3
       with:
         path: .mutmut-cache
-        key: ${{ runner.os }}-mutmut-cache-${{ hashFiles('bookshelf/*.py') }}
+        key: mutmut-cache-${{ github.head_ref }}-${{ hashFiles('bookshelf/*.py') }}
+        restore-keys: |
+          mutmut-cache-${{ github.head_ref }}
+          mutmut-cache-main
 
     - name: 🦠 Run Mutation Tests
       run: | 
@@ -54,4 +57,4 @@ jobs:
       uses: actions/cache/save@v3
       with:
         path: .mutmut-cache
-        key: ${{ runner.os }}-mutmut-cache-${{ hashFiles('bookshelf/*.py') }}
+        key: mutmut-cache-${{ github.head_ref }}-${{ hashFiles('bookshelf/*.py') }}