diff --git a/.env.sample b/.env.sample
index c6ba74f..8308790 100644
--- a/.env.sample
+++ b/.env.sample
@@ -34,6 +34,7 @@ COMPOSE_FILE="compose.yml"
 # CMD_ALLOW_ANONYMOUS_EDITS=false
 # CMD_ALLOW_EMAIL_REGISTER=true
 # CMD_ALLOW_FREEURL=false
+# CMD_REQUIRE_FREEURL_AUTHENTICATION=true
 # CMD_ALLOW_GRAVATAR=true
 # CMD_ALLOW_ORIGIN=localhost
 # CMD_COOKIE_POLICY=lax
diff --git a/compose.yml b/compose.yml
index f911958..3cee36f 100644
--- a/compose.yml
+++ b/compose.yml
@@ -16,6 +16,7 @@ services:
       - CMD_ALLOW_ANONYMOUS_EDITS
       - CMD_ALLOW_EMAIL_REGISTER
       - CMD_ALLOW_FREEURL
+      - CMD_REQUIRE_FREEURL_AUTHENTICATION
       - CMD_ALLOW_GRAVATAR
       - CMD_ALLOW_ORIGIN
       - CMD_COOKIE_POLICY