diff --git a/package/python-crossbar/Config.in b/package/python-crossbar/Config.in
index 526d9871be..2b9077ae87 100644
--- a/package/python-crossbar/Config.in
+++ b/package/python-crossbar/Config.in
@@ -39,6 +39,7 @@ config BR2_PACKAGE_PYTHON_CROSSBAR
 	select BR2_PACKAGE_PYTHON_U_MSGPACK
 	select BR2_PACKAGE_PYTHON_UBJSON
 	select BR2_PACKAGE_PYTHON_WATCHDOG
+	select BR2_PACKAGE_PYTHON_WERKZEUG
 	select BR2_PACKAGE_PYTHON_ZOPE_INTERFACE
 	help
 	  Crossbar.io is an open-source WAMP application router that