diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 3062461d..7c31c304 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -31,21 +31,21 @@ jobs:
       packages: write
     steps:
       - name: Checkout (GitHub)
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Login to GitHub Container Registry
-        uses: docker/login-action@v2
+        uses: docker/login-action@v3
         with:
           registry: ghcr.io
           username: ${{ github.repository_owner }}
-          password: ${{ secrets.GITHUB_TOKEN }}
+          password: ${{ github.token }}
 
       - name: Build and run Dev Container task
         uses: devcontainers/ci@v0.3
         with:
           imageName: ghcr.io/mt-caret/polars-ocaml
           cacheFrom: ghcr.io/mt-caret/polars-ocaml
-          push: always
+          refFilterForPush: refs/heads/main
           runCmd: |
             opam exec -- dune build
             opam exec -- dune runtest
@@ -57,21 +57,20 @@ jobs:
       packages: write
     steps:
       - name: Checkout (GitHub)
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Login to GitHub Container Registry
-        uses: docker/login-action@v2
+        uses: docker/login-action@v3
         with:
           registry: ghcr.io
           username: ${{ github.repository_owner }}
-          password: ${{ secrets.GITHUB_TOKEN }}
+          password: ${{ github.token }}
 
       - name:
         uses: devcontainers/ci@v0.3
         with:
           imageName: ghcr.io/mt-caret/polars-ocaml
           cacheFrom: ghcr.io/mt-caret/polars-ocaml
-          push: always
           runCmd: |
             apt install --yes pkg-config libssl-dev
             cargo install cargo-msrv
@@ -80,7 +79,7 @@ jobs:
   rust-checks:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       # We need nightly, at least until
       # https://github.com/mt-caret/polars-ocaml/pull/30 is merged.
@@ -118,10 +117,12 @@ jobs:
   ocaml-checks:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: ocaml/setup-ocaml@v2
         with:
           ocaml-compiler: 4.14.x
 
+      - uses: ocaml/setup-ocaml/lint-opam@v2
+
       - uses: ocaml/setup-ocaml/lint-fmt@v2
diff --git a/.github/workflows/odoc.yaml b/.github/workflows/odoc.yaml
new file mode 100644
index 00000000..d4ff0316
--- /dev/null
+++ b/.github/workflows/odoc.yaml
@@ -0,0 +1,54 @@
+name: Deploy odoc to GitHub Pages
+
+on:
+  push:
+    branches:
+      - main
+
+permissions: read-all
+
+concurrency:
+  group: deploy-odoc
+  cancel-in-progress: true
+
+jobs:
+  deploy-odoc:
+    runs-on: ubuntu-latest
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    permissions:
+      contents: read
+      id-token: write
+      pages: write
+
+    steps:
+      - name: Checkout (GitHub)
+        uses: actions/checkout@v4
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build documentation
+        uses: devcontainers/ci@v0.3
+        with:
+          imageName: ghcr.io/mt-caret/polars-ocaml
+          cacheFrom: ghcr.io/mt-caret/polars-ocaml
+          runCmd: |
+            opam exec -- dune build @doc
+
+      - name: Set-up Pages
+        uses: actions/configure-pages@v4
+
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v2
+        with:
+          path: _build/default/_doc/_html
+
+      - name: Deploy odoc to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v3
diff --git a/dune-project b/dune-project
index 1ffac3bd..17fb7ce4 100644
--- a/dune-project
+++ b/dune-project
@@ -7,9 +7,9 @@
 (source
  (github mt-caret/polars-ocaml))
 
-(authors "mtakeda")
+(authors mtakeda)
 
-(maintainers "mtakeda")
+(maintainers mtakeda)
 
 (license MIT)
 
@@ -25,6 +25,8 @@
   (core_bench :with-test)
   (expect_test_helpers_core :with-test)
   (mdx :with-test)
+  (ocaml
+   (< 5.0.0))
   (ocamlformat :dev)
   (odoc :with-doc)
   (re2 :with-test)
@@ -35,8 +37,6 @@
   core_unix
   dune
   ; ocaml-interop does not yet properly support OCaml 5
-  (ocaml
-   (< 5.0.0))
   ppx_jane
   ppx_typed_fields)
  (tags
@@ -56,6 +56,7 @@
   (shell :with-test)
   async
   core
-  polars)
+  polars
+  ppx_jane)
  (tags
   (data-science polars rust)))
diff --git a/polars.opam b/polars.opam
index 62b215a2..42b90823 100644
--- a/polars.opam
+++ b/polars.opam
@@ -13,6 +13,7 @@ depends: [
   "core_bench" {with-test}
   "expect_test_helpers_core" {with-test}
   "mdx" {with-test}
+  "ocaml" {< "5.0.0"}
   "ocamlformat" {dev}
   "odoc" {with-doc}
   "re2" {with-test}
@@ -22,7 +23,6 @@ depends: [
   "core_kernel"
   "core_unix"
   "dune" {>= "3.8"}
-  "ocaml" {< "5.0.0"}
   "ppx_jane"
   "ppx_typed_fields"
 ]
diff --git a/polars_async.opam b/polars_async.opam
index 6a40cf1d..3c94c1f8 100644
--- a/polars_async.opam
+++ b/polars_async.opam
@@ -21,6 +21,7 @@ depends: [
   "async"
   "core"
   "polars"
+  "ppx_jane"
 ]
 build: [
   ["dune" "subst"] {dev}