diff --git a/.github/workflows/master.yml b/.github/workflows/master.yml
index ce4aae41..d1271416 100644
--- a/.github/workflows/master.yml
+++ b/.github/workflows/master.yml
@@ -1,9 +1,9 @@
 name: Build master in docker
 
 on:
-  pull_request:
-    branches:
-      - 'master'
+  # pull_request:
+  #   branches:
+  #     - 'master'
   push:
     branches:
       - 'master'
diff --git a/.github/workflows/master52.yml b/.github/workflows/master52.yml
new file mode 100644
index 00000000..9b836f2a
--- /dev/null
+++ b/.github/workflows/master52.yml
@@ -0,0 +1,93 @@
+name: Build master in docker (OCaml 5.2)
+
+on:
+  # pull_request:
+  #   branches:
+  #     - 'master'
+  push:
+    branches:
+      - 'master'
+    paths-ignore:
+      - 'README.md'
+
+env:
+  OPAMROOT: /home/opam/.opam
+  OPAMCONFIRMLEVEL: unsafe-yes
+  GT_WITH_DOCS: yes
+
+jobs:
+  build:
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-latest
+
+    runs-on: ${{ matrix.os }}
+    container:
+      image: ocaml/opam:ubuntu-lts-ocaml-5.2
+      options: --user root               # dirty hack
+
+    steps:
+      - name: Cancel Previous Runs
+        uses: styfle/cancel-workflow-action@0.12.1
+        with:
+          access_token: ${{ github.token }}
+
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - run: sudo apt-get update
+      - run: opam --version
+
+      - name: Update submodules
+        if: false
+        run: |
+          git config --global --add safe.directory /__w/GT/GT
+          git submodule update --init
+
+      - run: opam pin add GT . --no-action
+        if: false
+
+      - run: opam depext GT --yes #--with-test
+        if: false
+
+      - name: Install dependecies for documentation
+        if: false
+        run: |
+          sudo apt-get install pkg-config libpcre2-dev -y
+          #opam install odoc pa_ppx --yes --depext
+          opam install odoc pa_ppx --yes
+
+      - run: opam install . --deps-only --with-test --with-doc
+      - run: opam exec -- dune build  --profile=release
+      - run: opam exec -- dune test   --profile=release
+
+      - name: Build documentation
+        run: opam exec -- dune build -p GT @doc
+
+      - name: Installing using Opam
+        run: |
+          opam exec -- dune build @install
+          opam exec -- dune install
+
+      - name: List files
+        run: opam show --list-files GT
+
+      # disabled, because we will do a deploy from OCaml 4.14
+      # - name: Deploy documentation
+      #   if: ${{ github.event.pull_request.head.repo.full_name == 'PLTools/OCanren' }}
+      #   uses: peaceiris/actions-gh-pages@v3
+      #   with:
+      #     github_token: ${{ secrets.GITHUB_TOKEN }}
+      #     publish_dir: ./_build/default/_doc/_html
+
+      # - name: Send coverage report to Coveralls
+      #   run: |
+      #     #git config --global --add safe.directory /__w/zanuda/zanuda
+      #     opam exec -- make coverage
+      #     opam exec -- bisect-ppx-report send-to Coveralls --coverage-path $BISECT_DIR
+      #   env:
+      #     BISECT_DIR: /tmp/GTcov
+      #     COVERALLS_REPO_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      #     PULL_REQUEST_NUMBER: ${{ github.event.number }}
diff --git a/GT.opam b/GT.opam
index bd7c2774..90a45efc 100644
--- a/GT.opam
+++ b/GT.opam
@@ -26,12 +26,14 @@ depends: [
   "ocaml" {>= "4.13" & < "5.0.0" | >= "5.2.0" & < "5.3.0"}
   "camlp5" {>= "8.00.05"}
   "dune" {>= "2.8"}
+  "ocamlgraph"
+  "ppx_inline_test"
   "ocamlfind" {build}
   "logger-p5" {build}
   "bisect_ppx" {build}
   "conf-m4" {build}
-  "ocamlgraph"
-  "ppx_inline_test"
+  "doc" {with-doc}
+  "odig" {with-doc}
   "odoc" {with-doc}
 ]
 build: [
diff --git a/dune-project b/dune-project
index 7e423af6..2fa7a652 100644
--- a/dune-project
+++ b/dune-project
@@ -37,12 +37,14 @@
   (camlp5
    (>= "8.00.05"))
   dune
+  ocamlgraph
+  ppx_inline_test
   (ocamlfind :build)
   (logger-p5 :build)
   (bisect_ppx :build)
   (conf-m4 :build)
-  ocamlgraph
-  ppx_inline_test
+  (doc :with-doc)
+  (odig :with-doc)
   ;
   ))