diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
new file mode 100644
index 0000000..f4382a0
--- /dev/null
+++ b/.github/workflows/main.yml
@@ -0,0 +1,41 @@
+name: main
+
+on:
+  pull_request:
+  push:
+  schedule:
+    - cron: 0 1 * * MON
+
+permissions: read-all
+
+jobs:
+  build:
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - debian-latest
+        ocaml-compiler:
+          - "4.14"
+          - "5.1"
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - name: checkout tree
+        uses: actions/checkout@v4
+
+      - name: set-up OCaml ${{ matrix.ocaml-compiler }}
+        uses: ocaml/setup-ocaml@v2
+        with:
+          ocaml-compiler: ${{ matrix.ocaml-compiler }}
+
+      - run: opam repo add andreypopp https://github.com/andreypopp/opam-repository.git
+
+      - run: opam update
+
+      - run: opam install . --deps-only --with-test
+
+      - run: opam exec -- dune build
+
+      - run: opam exec -- dune runtest