diff --git a/src/wheelhouse.txt b/src/wheelhouse.txt
index 81ce1f7..f3f9e81 100644
--- a/src/wheelhouse.txt
+++ b/src/wheelhouse.txt
@@ -1,6 +1,7 @@
 zipp<2.0.0
 oslo_config
 oslo_i18n
+importlib_metadata<3.1.1
 
 git+https://github.com/openstack/charms.openstack.git#egg=charms.openstack