diff --git a/codegen/smithy-aws-go-codegen/src/main/resources/software/amazon/smithy/aws/go/codegen/endpoints.json b/codegen/smithy-aws-go-codegen/src/main/resources/software/amazon/smithy/aws/go/codegen/endpoints.json
index e40ae5328c6..6c052bed152 100644
--- a/codegen/smithy-aws-go-codegen/src/main/resources/software/amazon/smithy/aws/go/codegen/endpoints.json
+++ b/codegen/smithy-aws-go-codegen/src/main/resources/software/amazon/smithy/aws/go/codegen/endpoints.json
@@ -2827,6 +2827,28 @@
           "us-west-2" : { }
         }
       },
+      "codestar-notifications" : {
+        "endpoints" : {
+          "ap-east-1" : { },
+          "ap-northeast-1" : { },
+          "ap-northeast-2" : { },
+          "ap-south-1" : { },
+          "ap-southeast-1" : { },
+          "ap-southeast-2" : { },
+          "ca-central-1" : { },
+          "eu-central-1" : { },
+          "eu-north-1" : { },
+          "eu-west-1" : { },
+          "eu-west-2" : { },
+          "eu-west-3" : { },
+          "me-south-1" : { },
+          "sa-east-1" : { },
+          "us-east-1" : { },
+          "us-east-2" : { },
+          "us-west-1" : { },
+          "us-west-2" : { }
+        }
+      },
       "cognito-identity" : {
         "endpoints" : {
           "ap-northeast-1" : { },
@@ -7604,6 +7626,7 @@
           "ap-south-1" : { },
           "ap-southeast-1" : { },
           "ap-southeast-2" : { },
+          "ap-southeast-3" : { },
           "ca-central-1" : { },
           "eu-central-1" : { },
           "eu-north-1" : { },