diff --git a/.azure/modules/postgreSql/AddAdministrationAccess.bicep b/.azure/modules/postgreSql/AddAdministrationAccess.bicep
index 5a2e2169..63050d9e 100644
--- a/.azure/modules/postgreSql/AddAdministrationAccess.bicep
+++ b/.azure/modules/postgreSql/AddAdministrationAccess.bicep
@@ -3,7 +3,7 @@ param tenantId string
 param appName string
 param namePrefix string
 
-resource databaseServer 'Microsoft.DBforPostgreSQL/flexibleServers@2022-12-01' existing = {
+resource databaseServer 'Microsoft.DBforPostgreSQL/flexibleServers@2023-12-01-preview' existing = {
   name: '${namePrefix}-dbserver'
 }
 resource databaseAccess 'Microsoft.DBforPostgreSQL/flexibleServers/administrators@2022-12-01' = {
diff --git a/.azure/modules/postgreSql/create.bicep b/.azure/modules/postgreSql/create.bicep
index 9f9e319f..adb125ae 100644
--- a/.azure/modules/postgreSql/create.bicep
+++ b/.azure/modules/postgreSql/create.bicep
@@ -43,11 +43,11 @@ module saveMigrationConnectionString '../keyvault/upsertSecret.bicep' = {
   }
 }
 
-resource postgres 'Microsoft.DBforPostgreSQL/flexibleServers@2022-12-01' = {
+resource postgres 'Microsoft.DBforPostgreSQL/flexibleServers@2023-12-01-preview' = {
   name: '${namePrefix}-dbserver'
   location: location
   properties: {
-    version: '15'
+    version: '16'
     administratorLogin: databaseUser
     administratorLoginPassword: administratorLoginPassword
     storage: {