diff --git a/schemas/2022-01-01-preview/Microsoft.App.json b/schemas/2022-01-01-preview/Microsoft.App.json
index d23e684356..20d125412b 100644
--- a/schemas/2022-01-01-preview/Microsoft.App.json
+++ b/schemas/2022-01-01-preview/Microsoft.App.json
@@ -2812,7 +2812,8 @@
         "maxReplicas": {
           "oneOf": [
             {
-              "type": "integer"
+              "type": "integer",
+              "default": "10"
             },
             {
               "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
diff --git a/schemas/2022-06-01-preview/Microsoft.App.json b/schemas/2022-06-01-preview/Microsoft.App.json
index 52f5a19098..284ccb059a 100644
--- a/schemas/2022-06-01-preview/Microsoft.App.json
+++ b/schemas/2022-06-01-preview/Microsoft.App.json
@@ -3611,7 +3611,8 @@
         "maxReplicas": {
           "oneOf": [
             {
-              "type": "integer"
+              "type": "integer",
+              "default": "10"
             },
             {
               "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"