diff --git a/.github/workflows/ic-ref.yml b/.github/workflows/ic-ref.yml
index d6e7689d..15671338 100644
--- a/.github/workflows/ic-ref.yml
+++ b/.github/workflows/ic-ref.yml
@@ -39,7 +39,9 @@ jobs:
         with:
           path: |
             ~/.cabal/store
-          key: ${{ runner.os }}-${{ matrix.ghc }}-cabal-store
+          key: cabal-${{ runner.os }}-${{ matrix.ghc }}-${{ hashFiles('ic-hs/cabal.project', 'ic-hs/cabal.project.freeze') }}
+          restore-keys: cabal-${{ runner.os }}-${{ matrix.ghc }}-
+
 
       - uses: actions/setup-haskell@v1.1.3
         with: