diff --git a/Dockerfile b/Dockerfile
index e12fc72..c315c8a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM mailserver2/debian-mail-overlay:1.0.15
+FROM mailserver2/debian-mail-overlay:1.0.16
 
 LABEL description="Simple and full-featured mail server using Docker"
 
diff --git a/Makefile b/Makefile
index 429b399..3b83461 100644
--- a/Makefile
+++ b/Makefile
@@ -63,7 +63,7 @@ init_postgres:
 		-e POSTGRES_USER=postfix \
 		-e POSTGRES_PASSWORD=testpasswd \
 		-v "`pwd`/test/config/postgres":/docker-entrypoint-initdb.d \
-		-t postgres:14-alpine
+		-t postgres:16-alpine
 
 init_ldap: init_openldap init_redis
 	-docker rm -f \