diff --git a/aws/rds.yaml b/aws/rds.yaml
index 69f29b8..78df42d 100644
--- a/aws/rds.yaml
+++ b/aws/rds.yaml
@@ -238,7 +238,7 @@ Resources:
       MultiAZ: false
       #NetworkType: IPV4
       EngineVersion: !Ref dbEngineMajorVer 
-      AllowMajorVersionUpgrade: true
+      AllowMajorVersionUpgrade: false
       AutoMinorVersionUpgrade: true
       LicenseModel: "general-public-license"
       PubliclyAccessible: false