diff --git a/vars/pkgs/postgresql_server.yml b/vars/pkgs/postgresql_server.yml
index 644c5fa..070d954 100644
--- a/vars/pkgs/postgresql_server.yml
+++ b/vars/pkgs/postgresql_server.yml
@@ -11,7 +11,7 @@ postgresql_server:
         - '@postgresql:15'
         - postgresql-server
         - postgresql-contrib
-      16:
+      "16":
         - '@postgresql:16'
         - postgresql-server
         - postgresql-contrib