diff --git a/packages/mermaid/src/schemas/config.schema.yaml b/packages/mermaid/src/schemas/config.schema.yaml
index a72016313..ce6219eb8 100644
--- a/packages/mermaid/src/schemas/config.schema.yaml
+++ b/packages/mermaid/src/schemas/config.schema.yaml
@@ -1994,21 +1994,32 @@ $defs: # JSON Schema definition (maybe we should move these to a separate file)
     properties:
       rowHeight:
         description: The height of each row in the packet diagram.
+        type: number
+        minimum: 1
         default: 32
       bitWidth:
         description: The width of each bit in the packet diagram.
+        type: number
+        minimum: 1
         default: 32
       bitsPerRow:
         description: The number of bits to display per row.
+        type: number
+        minimum: 1
         default: 32
       showBits:
         description: Toggle to display or hide bit numbers.
+        type: boolean
         default: true
       paddingX:
         description: The horizontal padding between the blocks in a row.
+        type: number
+        minimum: 0
         default: 5
       paddingY:
         description: The vertical padding between the rows.
+        type: number
+        minimum: 0
         default: 5
 
   FontCalculator: