diff --git a/.github/workflows/php-class-diagram.yml b/.github/workflows/php-class-diagram.yml
index e4a17093..bdf4c7dc 100644
--- a/.github/workflows/php-class-diagram.yml
+++ b/.github/workflows/php-class-diagram.yml
@@ -24,6 +24,7 @@ jobs:
             output-path: ./images/php-class-diagram.svg
             target-repo: ${{ github.repository }}
             target-branch: ${{ github.ref_name }}
+            options: --hide-private-methods
 
         - name: Upload Artifact
           uses: actions/upload-artifact@v4
diff --git a/README.md b/README.md
index a70e2421..ec51948f 100644
--- a/README.md
+++ b/README.md
@@ -244,6 +244,10 @@ SevericeLocator::setReader(new AttributeReader);`
 
 * See also the DI framework [Ray.Di](https://github.com/ray-di/Ray.Di) which integrates DI and AOP.
 
+## Technical Information
+
+* [Class Diagram](https://ray-di.github.io/Ray.Aop/images/php-class-diagram.svg) - Class interrelationship diagram created by　[php-class-diagram](https://github.com/smeghead/php-class-diagram).
+
 ---
 
 * Note: This documentation of the part is taken from [Guice/AOP](https://github.com/google/guice/wiki/AOP).