diff --git a/docs/config/setup/modules/mermaidAPI.md b/docs/config/setup/modules/mermaidAPI.md
index e84eb0f86..b078a688f 100644
--- a/docs/config/setup/modules/mermaidAPI.md
+++ b/docs/config/setup/modules/mermaidAPI.md
@@ -97,7 +97,7 @@ mermaid.initialize(config);
 
 #### Defined in
 
-[mermaidAPI.ts:623](https://github.com/mermaid-js/mermaid/blob/master/packages/mermaid/src/mermaidAPI.ts#L623)
+[mermaidAPI.ts:622](https://github.com/mermaid-js/mermaid/blob/master/packages/mermaid/src/mermaidAPI.ts#L622)
 
 ## Functions
 
diff --git a/packages/mermaid/src/config.type.ts b/packages/mermaid/src/config.type.ts
index fd6649032..d9a43c311 100644
--- a/packages/mermaid/src/config.type.ts
+++ b/packages/mermaid/src/config.type.ts
@@ -205,7 +205,7 @@ export interface BaseDiagramConfig {
  * via the `definition` "BlockDiagramConfig".
  */
 export interface BlockDiagramConfig extends BaseDiagramConfig {
-  padding?: unknown;
+  padding?: number;
 }
 /**
  * The object containing configurations specific for c4 diagrams
diff --git a/packages/mermaid/src/schemas/config.schema.yaml b/packages/mermaid/src/schemas/config.schema.yaml
index 90003a707..19367eb41 100644
--- a/packages/mermaid/src/schemas/config.schema.yaml
+++ b/packages/mermaid/src/schemas/config.schema.yaml
@@ -2060,6 +2060,8 @@ $defs: # JSON Schema definition (maybe we should move these to a separate file)
     unevaluatedProperties: false
     properties:
       padding:
+        type: number
+        minimum: 0
         default: 8
 
   FontCalculator: