diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index a7c0d798..6a49865f 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -29,7 +29,7 @@ jobs:
         with:
           # OCaml cache files are stored in `~/.opam` on Linux/macOS
           path: ~/.opam
-          key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('catala.opam', 'legifrance_catala.opam') }}
+          key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('catala.opam', 'Makefile') }}
           restore-keys: |
             ${{ runner.os }}-build-${{ env.cache-name }}-
             ${{ runner.os }}-build-
@@ -39,7 +39,7 @@ jobs:
         uses: avsm/setup-ocaml@v1
         with:
           # Version of the OCaml compiler to initialise
-          ocaml-version: 4.11.0
+          ocaml-version: 4.12.0
 
       - name: Install dependencies
         run: |