diff --git a/lib/auth_config.rb b/lib/auth_config.rb
index 66f0adbb7..c9cd67995 100644
--- a/lib/auth_config.rb
+++ b/lib/auth_config.rb
@@ -22,7 +22,7 @@ def host_url
     end
 
     def keycloak_redirect_host_url
-      get_var_from_environment(:keycloak_redirect_host_url, default: host_url)
+      get_var_from_environment(:keycloak_redirect_host_url, required: false, default: host_url)
     end
 
     def realm