diff --git a/codegen/sdk-codegen/aws-models/auto-scaling.json b/codegen/sdk-codegen/aws-models/auto-scaling.json
index 61cda6ef177a..4821b31e5b94 100644
--- a/codegen/sdk-codegen/aws-models/auto-scaling.json
+++ b/codegen/sdk-codegen/aws-models/auto-scaling.json
@@ -824,7 +824,7 @@
           }
         },
         "VPCZoneIdentifier": {
-          "target": "com.amazonaws.autoscaling#XmlStringMaxLen2047",
+          "target": "com.amazonaws.autoscaling#XmlStringMaxLen5000",
           "traits": {
             "smithy.api#documentation": "<p>One or more subnet IDs, if applicable, separated by commas.</p>"
           }
@@ -3013,7 +3013,7 @@
           }
         },
         "VPCZoneIdentifier": {
-          "target": "com.amazonaws.autoscaling#XmlStringMaxLen2047",
+          "target": "com.amazonaws.autoscaling#XmlStringMaxLen5000",
           "traits": {
             "smithy.api#documentation": "<p>A comma-separated list of subnet IDs for a virtual private cloud (VPC) where instances\n            in the Auto Scaling group can be created. If you specify <code>VPCZoneIdentifier</code> with\n                <code>AvailabilityZones</code>, the subnets that you specify must reside in those\n            Availability Zones.</p>"
           }
@@ -10833,7 +10833,7 @@
           }
         },
         "VPCZoneIdentifier": {
-          "target": "com.amazonaws.autoscaling#XmlStringMaxLen2047",
+          "target": "com.amazonaws.autoscaling#XmlStringMaxLen5000",
           "traits": {
             "smithy.api#documentation": "<p>A comma-separated list of subnet IDs for a virtual private cloud (VPC). If you specify\n                <code>VPCZoneIdentifier</code> with <code>AvailabilityZones</code>, the subnets that\n            you specify must reside in those Availability Zones.</p>"
           }
@@ -11071,6 +11071,16 @@
         "smithy.api#pattern": "^[\\u0020-\\uD7FF\\uE000-\\uFFFD\\uD800\\uDC00-\\uDBFF\\uDFFF\\r\\n\\t]*$"
       }
     },
+    "com.amazonaws.autoscaling#XmlStringMaxLen5000": {
+      "type": "string",
+      "traits": {
+        "smithy.api#length": {
+          "min": 1,
+          "max": 5000
+        },
+        "smithy.api#pattern": "^[\\u0020-\\uD7FF\\uE000-\\uFFFD\\uD800\\uDC00-\\uDBFF\\uDFFF\\r\\n\\t]*$"
+      }
+    },
     "com.amazonaws.autoscaling#XmlStringMaxLen511": {
       "type": "string",
       "traits": {