diff --git a/LayoutOptions.md b/LayoutOptions.md
index efa3375..818cb0b 100644
--- a/LayoutOptions.md
+++ b/LayoutOptions.md
@@ -19,7 +19,7 @@ C4-PlantUML comes with some layout options.
     - [Using SHOW_PERSON_PORTRAIT()](#using-show_person_portrait)
     - [Using SHOW_PERSON_OUTLINE()](#using-show_person_outline)
 - samples
-  - [:page_facing_up: Core Diagrams](samples/C4CoreDiagrams.md#core-diagrams)
+  - [:page_facing_up: Core Diagrams](samples/C4CoreDiagrams.md#c4-model-diagrams)
 
 ## Layout Guidance and Practices
 
diff --git a/README.md b/README.md
index 8c0cb23..8ab7a7a 100644
--- a/README.md
+++ b/README.md
@@ -55,7 +55,7 @@ C4-PlantUML includes macros, stereotypes, and other goodies (like VSCode Snippet
   - [License](#license)
 - [:page_facing_up: Layout Options](LayoutOptions.md#layout-options)
 - samples
-  - [:page_facing_up: Core Diagrams](samples/C4CoreDiagrams.md#core-diagrams)
+  - [:page_facing_up: Core Diagrams](samples/C4CoreDiagrams.md#c4-model-diagrams)
 
 ## Getting Started