diff --git a/pica-dokuwiki/docker-compose.yml b/pica-dokuwiki/docker-compose.yml
index 410f9e756362f9c1ed74f8d260e112285c42499e..92177714cad53e452790211167b829c8c5ac73ee 100644
--- a/pica-dokuwiki/docker-compose.yml
+++ b/pica-dokuwiki/docker-compose.yml
@@ -2,8 +2,8 @@ version : "2.4"
 
 volumes:
   dokuwiki-app-volume:
-    external: 
-        name: "dokuwiki-app"
+    external: true 
+    name: "dokuwiki-app"
 
 networks:
   docker_default: