diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 5ddd600..ce99ca9 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: MPL-2.0
 # For most projects, this workflow file will not need changing; you simply need
 # to commit it to your repository.
 #
diff --git a/.github/workflows/generator-generic-ossf-slsa3-publish.yml b/.github/workflows/generator-generic-ossf-slsa3-publish.yml
index 49476b3..a8484d1 100644
--- a/.github/workflows/generator-generic-ossf-slsa3-publish.yml
+++ b/.github/workflows/generator-generic-ossf-slsa3-publish.yml
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: MPL-2.0
 # This workflow uses actions that are not certified by GitHub.
 # They are provided by a third-party and are governed by
 # separate terms of service, privacy policy, and support
diff --git a/.github/workflows/pages.yml b/.github/workflows/pages.yml
index 649dcb1..2697b6e 100755
--- a/.github/workflows/pages.yml
+++ b/.github/workflows/pages.yml
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: MPL-2.0
 name: GitHub Pages (Ddraig SSG)
 on:
   push:
diff --git a/.github/workflows/php.yml b/.github/workflows/php.yml
index b1f5a90..cfc1e5a 100644
--- a/.github/workflows/php.yml
+++ b/.github/workflows/php.yml
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: MPL-2.0
 name: PHP Composer
 
 on:
diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 26df678..c74b4b0 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: MPL-2.0
 name: Rust
 
 on: