diff --git a/.github/workflows/composer-install.yml b/.github/workflows/composer-install.yml
index 5374e2d..15a8cf2 100644
--- a/.github/workflows/composer-install.yml
+++ b/.github/workflows/composer-install.yml
@@ -1,4 +1,5 @@
 ---
+# yaml-language-server: $schema=https://json.schemastore.org/github-workflow.json
 name: Run Composer Install
 
 on:
diff --git a/.github/workflows/compress-images.yml b/.github/workflows/compress-images.yml
index ab41970..b8994e0 100644
--- a/.github/workflows/compress-images.yml
+++ b/.github/workflows/compress-images.yml
@@ -1,4 +1,6 @@
 ---
+# yaml-language-server: $schema=https://json.schemastore.org/github-workflow.json
+#
 # Compress images on demand (workflow_dispatch), and at 11pm every Sunday (schedule).
 # Open a Pull Request if any images can be compressed.
 name: Compress Images on Demand
diff --git a/.github/workflows/dependency-review.yml b/.github/workflows/dependency-review.yml
index 2545ba3..ebba11a 100644
--- a/.github/workflows/dependency-review.yml
+++ b/.github/workflows/dependency-review.yml
@@ -1,4 +1,6 @@
 ---
+# yaml-language-server: $schema=https://json.schemastore.org/github-workflow.json
+#
 # Dependency Review Action
 #
 # This Action will scan dependency manifest files that change as part of a Pull Request,
diff --git a/.github/workflows/laravel-phpunit.yml b/.github/workflows/laravel-phpunit.yml
index ba9b096..00af07f 100644
--- a/.github/workflows/laravel-phpunit.yml
+++ b/.github/workflows/laravel-phpunit.yml
@@ -1,4 +1,5 @@
 ---
+# yaml-language-server: $schema=https://json.schemastore.org/github-workflow.json
 name: Laravel Setup and Composer test
 
 on:
diff --git a/.github/workflows/pr-compress-images.yml b/.github/workflows/pr-compress-images.yml
index cea93b5..92a5503 100644
--- a/.github/workflows/pr-compress-images.yml
+++ b/.github/workflows/pr-compress-images.yml
@@ -1,4 +1,5 @@
 ---
+# yaml-language-server: $schema=https://json.schemastore.org/github-workflow.json
 name: Compress Images
 
 on:
diff --git a/.github/workflows/release-drafter.yml b/.github/workflows/release-drafter.yml
index ca8de7d..efca43a 100644
--- a/.github/workflows/release-drafter.yml
+++ b/.github/workflows/release-drafter.yml
@@ -1,4 +1,5 @@
 ---
+# yaml-language-server: $schema=https://json.schemastore.org/github-workflow.json
 name: Release Drafter
 
 on:
diff --git a/.github/workflows/reviewdog-linters.yml b/.github/workflows/reviewdog-linters.yml
index 8124a22..160be7c 100644
--- a/.github/workflows/reviewdog-linters.yml
+++ b/.github/workflows/reviewdog-linters.yml
@@ -1,4 +1,5 @@
 ---
+# yaml-language-server: $schema=https://json.schemastore.org/github-workflow.json
 name: Reviewdog Linters
 
 on: [pull_request]
diff --git a/.github/workflows/sync-labels-to-own-projects.yml b/.github/workflows/sync-labels-to-own-projects.yml
index 617d181..14ce0c5 100644
--- a/.github/workflows/sync-labels-to-own-projects.yml
+++ b/.github/workflows/sync-labels-to-own-projects.yml
@@ -1,4 +1,5 @@
 ---
+# yaml-language-server: $schema=https://json.schemastore.org/github-workflow.json
 name: Sync labels to other repositories
 
 on: