diff --git a/.github/workflows/check-renovatebot-config.yml b/.github/workflows/check-renovatebot-config.yml
index c56bb36..6ff501c 100644
--- a/.github/workflows/check-renovatebot-config.yml
+++ b/.github/workflows/check-renovatebot-config.yml
@@ -8,13 +8,6 @@ on:
 
 jobs:
   validate:
-    name: Validate renovatebot config
-    runs-on: ubuntu-24.04
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-
-      - name: Validate
-        uses: suzuki-shunsuke/github-action-renovate-config-validator@v0.1.3
-        with:
-          config_file_path: renovatebot/jore4-default-preset.json5
+    uses: HSLdevcom/jore4-tools/.github/workflows/shared-check-renovatebot-config.yml@shared-check-renovatebot-config-v1
+    with:
+      config_file_path: renovatebot/jore4-default-preset.json5
diff --git a/.github/workflows/shared-check-renovatebot-config.yml b/.github/workflows/shared-check-renovatebot-config.yml
new file mode 100644
index 0000000..189742c
--- /dev/null
+++ b/.github/workflows/shared-check-renovatebot-config.yml
@@ -0,0 +1,29 @@
+name: Shared check renovatebot config
+
+on:
+  workflow_call:
+    inputs:
+      config_file_path:
+        description: Path to the Renovatebot config file to validate
+        type: string
+        required: true
+      checkout_submodules:
+        description: Whether to checkout submodules
+        type: string
+        required: false
+        default: "false"
+
+jobs:
+  validate:
+    name: Validate renovatebot config
+    runs-on: ubuntu-24.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+        with:
+          submodules: ${{ inputs.checkout_submodules }}
+
+      - name: Validate config
+        uses: suzuki-shunsuke/github-action-renovate-config-validator@c22827f47f4f4a5364bdba19e1fe36907ef1318e # v1.1.1
+        with:
+          config_file_path: ${{ inputs.config_file_path }}
diff --git a/README.md b/README.md
index 54ed086..dbb934e 100644
--- a/README.md
+++ b/README.md
@@ -294,10 +294,11 @@ onboarding flow ends.
 
 Example:
 ```
-- name: Validate
-  uses: suzuki-shunsuke/github-action-renovate-config-validator@v0.1.3
-  with:
-    config_file_path: .github/renovate.json5
+jobs:
+  validate:
+    uses: HSLdevcom/jore4-tools/.github/workflows/shared-check-renovatebot-config.yml@shared-check-renovatebot-config-v1
+    with:
+      config_file_path: renovatebot/jore4-default-preset.json5
 ```
 
 To see a bit more in detail how the renovatebot rules work, check the comments within the