diff --git a/test/fixtures/stacks/catalog/usecase/basic.yaml b/test/fixtures/stacks/catalog/usecase/basic.yaml
index 900576d..c687cd5 100644
--- a/test/fixtures/stacks/catalog/usecase/basic.yaml
+++ b/test/fixtures/stacks/catalog/usecase/basic.yaml
@@ -19,7 +19,7 @@ components:
 
         # Provisioned configuration
         engine_mode: provisioned
-        engine_version: "15.3"
+        engine_version: "15.13"
         cluster_family: aurora-postgresql15
         # 1 writer, 1 reader
         cluster_size: 2
diff --git a/test/fixtures/stacks/catalog/usecase/serverless.yaml b/test/fixtures/stacks/catalog/usecase/serverless.yaml
index bc6d7dc..021f1ec 100644
--- a/test/fixtures/stacks/catalog/usecase/serverless.yaml
+++ b/test/fixtures/stacks/catalog/usecase/serverless.yaml
@@ -20,7 +20,7 @@ components:
         # Serverless v2 configuration
         engine_mode: provisioned
         instance_type: "db.serverless" # serverless engine_mode ignores `var.instance_type`
-        engine_version: "13.15" # Latest supported version as of 08/28/2023
+        engine_version: "13.21" # Latest supported version as of 08/28/2023
         cluster_family: aurora-postgresql13
         cluster_size: 1
          # serverless