diff --git a/Allfiles/Labs/03/az104-03b-md-template.json b/Allfiles/Labs/03/az104-03b-md-template.json
index 3eed07e1..4c9a6e2e 100644
--- a/Allfiles/Labs/03/az104-03b-md-template.json
+++ b/Allfiles/Labs/03/az104-03b-md-template.json
@@ -12,7 +12,7 @@
             "type": "String"
         },
         "diskSizeGb": {
-            "type": "String"
+            "type": "Int"
         },
         "sourceResourceId": {
             "type": "String"