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 40440aed297..1f468912dec 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
@@ -15458,6 +15458,7 @@
           "ap-south-1" : { },
           "ap-southeast-1" : { },
           "ap-southeast-2" : { },
+          "ap-southeast-3" : { },
           "ca-central-1" : {
             "variants" : [ {
               "hostname" : "redshift-serverless-fips.ca-central-1.amazonaws.com",
@@ -19707,8 +19708,18 @@
           "ap-southeast-3" : { },
           "ap-southeast-4" : { },
           "ap-southeast-5" : { },
-          "ca-central-1" : { },
-          "ca-west-1" : { },
+          "ca-central-1" : {
+            "variants" : [ {
+              "hostname" : "synthetics-fips.ca-central-1.amazonaws.com",
+              "tags" : [ "fips" ]
+            } ]
+          },
+          "ca-west-1" : {
+            "variants" : [ {
+              "hostname" : "synthetics-fips.ca-west-1.amazonaws.com",
+              "tags" : [ "fips" ]
+            } ]
+          },
           "eu-central-1" : { },
           "eu-central-2" : { },
           "eu-north-1" : { },
@@ -19717,6 +19728,20 @@
           "eu-west-1" : { },
           "eu-west-2" : { },
           "eu-west-3" : { },
+          "fips-ca-central-1" : {
+            "credentialScope" : {
+              "region" : "ca-central-1"
+            },
+            "deprecated" : true,
+            "hostname" : "synthetics-fips.ca-central-1.amazonaws.com"
+          },
+          "fips-ca-west-1" : {
+            "credentialScope" : {
+              "region" : "ca-west-1"
+            },
+            "deprecated" : true,
+            "hostname" : "synthetics-fips.ca-west-1.amazonaws.com"
+          },
           "fips-us-east-1" : {
             "credentialScope" : {
               "region" : "us-east-1"