diff --git a/metadata.yaml b/metadata.yaml
index 3edd092d..a81fa10b 100644
--- a/metadata.yaml
+++ b/metadata.yaml
@@ -61,6 +61,7 @@ provides:
 requires:
   database:
     interface: mysql_client
+    limit: 1
   nginx-route:
     interface: nginx-route
     limit: 1