diff --git a/webserver/docker_hackmd/templates/docker-compose.yml b/webserver/docker_hackmd/templates/docker-compose.yml
index 60023d58f3f36494fb93ce944a3f6a8e5322dc30..6474911b808884f65e8e66d0904d04a0424b12c2 100644
--- a/webserver/docker_hackmd/templates/docker-compose.yml
+++ b/webserver/docker_hackmd/templates/docker-compose.yml
@@ -1,4 +1,3 @@
-
 version: "3"
 
 services:
@@ -17,6 +16,7 @@ services:
       CMD_ALLOW_ANONYMOUS: "true"
       CMD_ALLOW_ANONYMOUS_EDITS: "true"
       CMD_DEFAULT_PERMISSION: "freely"
+      CMD_ALLOW_FREEURL=true
       CMD_LDAP_URL: "ldap://{{ ldap_ip_ext }}:389"
       CMD_LDAP_BINDDN: "{{ ldap_readonly_bind_dn }}"
       CMD_LDAP_BINDCREDENTIALS: "{{ ldap_readonly_pass }}"