diff --git a/mta.yaml b/mta.yaml
index 8de9aa68..39b88f1f 100644
--- a/mta.yaml
+++ b/mta.yaml
@@ -82,7 +82,7 @@ resources:
       service: postgresql-db
       service-plan: standard
       config:
-        engine_version: "16"
+        engine_version: "15"
         multi_az: false
 
   - name: cf-logging
diff --git a/srv/src/main/resources/application.yaml b/srv/src/main/resources/application.yaml
index f3776f72..45c81c38 100644
--- a/srv/src/main/resources/application.yaml
+++ b/srv/src/main/resources/application.yaml
@@ -1,5 +1,5 @@
 ---
-my.bookshop.postgresImage: postgres:16
+my.bookshop.postgresImage: postgres:15
 
 cds:
   dataSource.csv:
@@ -26,4 +26,3 @@ spring:
 cds:
   dataSource:
     auto-config.enabled: false
-