diff --git a/.github/workflows/external-types.yml b/.github/workflows/external-types.yml
deleted file mode 100644
index 041b7f6..0000000
--- a/.github/workflows/external-types.yml
+++ /dev/null
@@ -1,48 +0,0 @@
-name: External Types
-
-on:
-  pull_request:
-    types: [opened, synchronize, reopened]
-  push:
-    branches: [main]
-
-permissions:
-  contents: read
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: true
-
-jobs:
-  check-external-types:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
-        with:
-          persist-credentials: false
-
-      - name: Install cargo-check-external-types,just
-        uses: taiki-e/install-action@6a1bd70eaac3c8bdf093356838d7ee09fda951cf # v2.85.5
-        with:
-          tool: cargo-check-external-types,just
-
-      - name: Install Nix
-        uses: nixbuild/nix-quick-install-action@9f63be77f412a248c9d9a65a4c82cf066cdf8f0c # v35
-
-      - name: Enter Nix devshell
-        uses: nicknovitski/nix-develop@9be7cfb4b10451d3390a75dc18ad0465bed4932a # v1.2.1
-        with:
-          arguments: .#ci
-
-      - name: Resolve external types toolchain
-        id: toolchain
-        run: echo "toolchain=$(just --evaluate external-types-toolchain)" >> "$GITHUB_OUTPUT"
-
-      - name: Install Rust
-        uses: actions-rust-lang/setup-rust-toolchain@166cdcfd11aee3cb47222f9ddb555ce30ddb9659 # v1.17.0
-        with:
-          toolchain: ${{ steps.toolchain.outputs.toolchain }}
-
-      - name: Check external types
-        run: just check-external-types
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 32d2312..16ef9f9 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -72,3 +72,13 @@ jobs:
         env:
           RUSTDOCFLAGS: "-D warnings"
         run: cargo doc --no-deps --all-features --workspace
+
+  external-types:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          persist-credentials: false
+
+      - uses: x52dev/actions/cargo-workspace-check-external-types@8dc0274800321d780097bc9b3b1ffa9f8dfb1e8b
diff --git a/justfile b/justfile
index 77c32f8..5217eff 100644
--- a/justfile
+++ b/justfile
@@ -4,7 +4,6 @@ _list:
     @just --list
 
 toolchain := ""
-external-types-toolchain := "nightly-2026-03-20"
 # Format project
 fmt:
     just --unstable --fmt
@@ -22,18 +21,6 @@ check:
     fd --hidden -e=toml --exec-batch taplo lint
     cargo shear
 
-[private]
-workspace-crate-manifests:
-    @cargo metadata --no-deps --format-version=1 \
-        | jq -r '(.workspace_root + "/") as $root | .workspace_members as $members | .packages[] | select(.id as $id | $members | index($id)) | .manifest_path | ltrimstr($root)'
-
-# Check crates are not leaking unexpected external types
-check-external-types:
-    just workspace-crate-manifests \
-        | while IFS= read -r manifest; do \
-            cargo +{{ external-types-toolchain }} check-external-types --manifest-path "$manifest"; \
-        done
-
 # Lint workspace with Clippy
 clippy:
     cargo {{ toolchain }} clippy --workspace --all-targets --all-features