diff --git a/src/restic_compose_backup/containers_db.py b/src/restic_compose_backup/containers_db.py
index 7344f68..d9b88c3 100644
--- a/src/restic_compose_backup/containers_db.py
+++ b/src/restic_compose_backup/containers_db.py
@@ -66,7 +66,7 @@ class MariadbContainer(Container):
 
         return restic.backup_files(
             config.repository,
-            destination,
+            f"{destination}",
             tags=self.tags
         )
 
@@ -141,7 +141,7 @@ class MysqlContainer(Container):
 
         return restic.backup_files(
             config.repository,
-            destination,
+            f"{destination}",
             tags=self.tags
         )