diff --git a/spire/templates/apps/castle.yml b/spire/templates/apps/castle.yml
index f3dba310..7ca72e8f 100644
--- a/spire/templates/apps/castle.yml
+++ b/spire/templates/apps/castle.yml
@@ -456,7 +456,7 @@ Resources:
       DeletionProtection: true
       EnablePerformanceInsights: !If [IsProduction, true, false]
       Engine: postgres
-      EngineVersion: 17.7 # aws rds describe-db-engine-versions --engine postgres --query "DBEngineVersions[*].{Engine:Engine,EngineVersion:EngineVersion}" --output text
+      EngineVersion: 17.9 # aws rds describe-db-engine-versions --engine postgres --query "DBEngineVersions[*].{Engine:Engine,EngineVersion:EngineVersion}" --output text
       MasterUsername: !Ref CastlePostgresUsername # Must be 1 to 63 letters or numbers
       MasterUserPassword: !Ref CastlePostgresUserPassword # Must contain from 8 to 128 characters
       MultiAZ: false