diff --git a/.github/workflows/auto_format.yml b/.github/workflows/auto_format.yml
index 60f8912..5e018d7 100644
--- a/.github/workflows/auto_format.yml
+++ b/.github/workflows/auto_format.yml
@@ -18,6 +18,7 @@ jobs:
         uses: ocaml/setup-ocaml@v2
         with:
           ocaml-compiler: "5.1"
+          dune-cache: true
           allow-prerelease-opam: true
           opam-repositories: | 
             default: https://github.com/ocaml/opam-repository.git
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 78df11d..6333693 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -42,6 +42,8 @@ jobs:
       - name: Set-up OCaml
         uses: ocaml/setup-ocaml@v2
         with:
+          dune-cache: true
+          cache-prefix: dune-cache-${{ matrix.os }}-${{ matrix.ocaml-compiler }}
           ocaml-compiler: ${{ matrix.ocaml-compiler }}
           allow-prerelease-opam: ${{ matrix.allow-prerelease-opam }}
           opam-repositories: ${{ matrix.opam-repositories }}