diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..ca79ca5
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,6 @@
+version: 2
+updates:
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: weekly
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 6072534..14451a0 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -13,7 +13,11 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
+        setup-version:
+          - v2
+          - v3
         os:
+          - macos-13
           - macos-latest
           - ubuntu-latest
           - windows-latest
@@ -30,6 +34,75 @@ jobs:
           - 4.11.x
           - 4.12.x
           - 4.13.x
+          - 4.14.x
+          - 5.0.x
+          - 5.1.x
+          - 5.2.x
+        exclude:
+          - os: macos-13
+            setup-version: v3 # opam uninstall fails
+          - os: macos-latest
+            setup-version: v2
+          - os: macos-latest
+            ocaml-version: 4.02.x
+          - os: macos-latest
+            ocaml-version: 4.03.x
+          - os: macos-latest
+            ocaml-version: 4.04.x
+          - os: macos-latest
+            ocaml-version: 4.05.x
+          - os: macos-latest
+            ocaml-version: 4.06.x
+          - os: macos-latest
+            ocaml-version: 4.07.x
+          - os: macos-latest
+            ocaml-version: 4.08.x
+          - os: macos-latest
+            ocaml-version: 4.09.x
+          - os: macos-latest
+            ocaml-version: 4.11.x
+          - os: windows-latest
+            setup-version: v3
+            ocaml-version: 4.02.x
+          - os: windows-latest
+            setup-version: v3
+            ocaml-version: 4.03.x
+          - os: windows-latest
+            setup-version: v3
+            ocaml-version: 4.04.x
+          - os: windows-latest
+            setup-version: v3
+            ocaml-version: 4.05.x
+          - os: windows-latest
+            setup-version: v3
+            ocaml-version: 4.06.x
+          - os: windows-latest
+            setup-version: v3
+            ocaml-version: 4.07.x
+          - os: windows-latest
+            setup-version: v3
+            ocaml-version: 4.08.x
+          - os: windows-latest
+            setup-version: v3
+            ocaml-version: 4.09.x
+          - os: windows-latest
+            setup-version: v3
+            ocaml-version: 4.10.x
+          - os: windows-latest
+            setup-version: v3
+            ocaml-version: 4.11.x
+          - os: windows-latest
+            setup-version: v3
+            ocaml-version: 4.12.x
+          - os: windows-latest
+            setup-version: v2
+            ocaml-version: 5.0.x
+          - os: windows-latest
+            setup-version: v2
+            ocaml-version: 5.1.x
+          - os: windows-latest
+            setup-version: v2
+            ocaml-version: 5.2.x
 
     runs-on: ${{ matrix.os }}
 
@@ -38,6 +111,20 @@ jobs:
         dose
         lilis
         rotor
+        camlimages
+        freetds
+        frenetic
+        genprint
+        hdf5
+        ocp-index-top
+        pa_ppx
+        pla
+        ppx_deriving_rpc
+        reed-solomon-erasure
+        setr
+        stdcompat
+        uwt
+      OPAMAUTOREMOVE: true
       SKIP_TEST: |
         0install
         bisect_ppx
@@ -53,13 +140,20 @@ jobs:
           git config --global init.defaultBranch master
 
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
-      - name: Use OCaml ${{ matrix.ocaml-version }}
+      - name: Setup OCaml ${{ matrix.ocaml-version }} with v2
+        if: matrix.setup-version == 'v2'
         uses: ocaml/setup-ocaml@v2
         with:
           ocaml-compiler: ${{ matrix.ocaml-version }}
 
+      - name: Setup OCaml ${{ matrix.ocaml-version }} with v3
+        if: matrix.setup-version == 'v3'
+        uses: ocaml/setup-ocaml@v3
+        with:
+          ocaml-compiler: ${{ matrix.ocaml-version }}
+
       - name: Install dependencies
         run: opam install --deps-only .
 
@@ -70,18 +164,18 @@ jobs:
         run: opam exec -- make
 
       - name: Upload the build artifact
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: ${{ matrix.os }}-${{ matrix.ocaml-version }}-cppo.exe
           path: _build/default/src/cppo_main.exe
+          overwrite: true
 
       - name: Build, test, and install package
         run: opam install -t .
 
       - name: Test dependants
         if: >
-          (runner.os == 'Linux' && matrix.ocaml-version >= '4.04') ||
-          (runner.os == 'macOS' && matrix.ocaml-version >= '4.13')
+          (matrix.ocaml-version >= '4.05') && (matrix.os != 'windows-latest')
         run: |
           PACKAGES=`opam list -s --color=never --installable --depends-on cppo,cppo_ocamlbuild`
           echo "Dependants:" $PACKAGES
@@ -97,11 +191,8 @@ jobs:
               echo ::group::Build and test $PACKAGE
              DEPS_FAILED=false
              (opam depext $PACKAGE &&
-              opam install --deps-only -t $PACKAGE) || DEPS_FAILED=true
+              opam install --deps-only $PACKAGE) || DEPS_FAILED=true
              [ $DEPS_FAILED == false ] && opam install $PACKAGE
              echo ::endgroup::
              [ $DEPS_FAILED == false ] || echo Dependencies broken
           done
-
-      - name: Uninstall package
-        run: opam uninstall .