diff --git a/.github/workflows/check-extension.yaml b/.github/workflows/check-extension.yaml
index 881639b..8166644 100644
--- a/.github/workflows/check-extension.yaml
+++ b/.github/workflows/check-extension.yaml
@@ -164,6 +164,7 @@ jobs:
       - uses: graycoreio/github-actions-magento2/coding-standard@main
         with:
           path: ${{ inputs.path }}
+          composer_auth: ${{ secrets.composer_auth }}
 
     integration_test:
       runs-on:  ${{ matrix.os }}
diff --git a/coding-standard/action.yml b/coding-standard/action.yml
index 19ca624..2a4d2b1 100644
--- a/coding-standard/action.yml
+++ b/coding-standard/action.yml
@@ -32,6 +32,11 @@ inputs:
     default: 'false'
     required: false
 
+  composer_auth:
+    required: false
+    default: ""
+    description: "Composer authentication credentials (contents of auth.json as a JSON string)"
+
 runs:
   using: composite
   steps:
@@ -56,6 +61,8 @@ runs:
       shell: bash
       working-directory: ${{ inputs.path }}
       run: composer require "magento/magento-coding-standard:${{ inputs.version || '*' }}" "magento/php-compatibility-fork"
+      env:
+        COMPOSER_AUTH: ${{ inputs.composer_auth }}
 
     - name: Register Coding Standard
       shell: bash