diff --git a/.github/workflows/nix.yml b/.github/workflows/nix.yml
index 8839cd4..eccb1a6 100644
--- a/.github/workflows/nix.yml
+++ b/.github/workflows/nix.yml
@@ -12,12 +12,9 @@ concurrency:
 jobs:
   tests:
     runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        ocamlVersion: [5_2]
     steps:
-    - uses: actions/checkout@v2
-    - uses: cachix/install-nix-action@v29
+    - uses: actions/checkout@v5
+    - uses: cachix/install-nix-action@v31
       with:
         extra_nix_config: |
           extra-substituters = https://anmonteiro.nix-cache.workers.dev
diff --git a/.github/workflows/opam.yml b/.github/workflows/opam.yml
index a16303e..6df606d 100644
--- a/.github/workflows/opam.yml
+++ b/.github/workflows/opam.yml
@@ -16,19 +16,19 @@ jobs:
           - macos-latest
           - ubuntu-latest
         ocaml-compiler:
-          - 5.1.1
+          - 5.2.x
 
       fail-fast: false
     runs-on: ${{ matrix.system }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v5
 
-      - uses: actions/setup-node@v3
+      - uses: actions/setup-node@v6
         with:
           node-version: current
 
       - name: Use OCaml ${{ matrix.ocaml-compiler }}
-        uses: ocaml/setup-ocaml@v2
+        uses: ocaml/setup-ocaml@v3
         with:
           ocaml-compiler: ${{ matrix.ocaml-compiler }}
           opam-depext: false