diff --git a/.github/workflows/e2e.yml b/.github/workflows/e2e.yml
index cd1346b..f2a18e3 100644
--- a/.github/workflows/e2e.yml
+++ b/.github/workflows/e2e.yml
@@ -46,7 +46,7 @@ jobs:
         uses: Swatinem/rust-cache@d1527c8f67ef9af357290475d4af4b0fab8f12e0 # v2
       # ---- OCaml ----
       - name: Set up OCaml
-        uses: ocaml/setup-ocaml@93303b622b2522e4411e295f9e77411a24912ac7 # v3
+        uses: ocaml/setup-ocaml@ff66428f72b64472e749b22e0ad4dded4b2ddca6 # v3
         with:
           ocaml-compiler: 5.1.x
       - name: Install opam dependencies
diff --git a/.github/workflows/ocaml-core.yml b/.github/workflows/ocaml-core.yml
index b9a8d7f..c594879 100644
--- a/.github/workflows/ocaml-core.yml
+++ b/.github/workflows/ocaml-core.yml
@@ -32,7 +32,7 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v4
       - name: Setup OCaml
-        uses: ocaml/setup-ocaml@93303b622b2522e4411e295f9e77411a24912ac7 # v3
+        uses: ocaml/setup-ocaml@ff66428f72b64472e749b22e0ad4dded4b2ddca6 # v3
         with:
           ocaml-compiler: ${{ matrix.ocaml-version }}
           dune-cache: true
@@ -53,7 +53,7 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v4
       - name: Setup OCaml
-        uses: ocaml/setup-ocaml@93303b622b2522e4411e295f9e77411a24912ac7 # v3
+        uses: ocaml/setup-ocaml@ff66428f72b64472e749b22e0ad4dded4b2ddca6 # v3
         with:
           ocaml-compiler: '5.1.0'
           dune-cache: true