diff --git a/requirements.txt b/requirements.txt
index a9d667888..57ed5966d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,8 @@ extras
 statsd>=3.0
 PrettyTable>=0.6,<0.8
 # openstacksdk before 0.21.0 has issues with dogpile.cache
-openstacksdk>=0.21.0
+# openstacksdk removes taskmanager in 0.27.0
+openstacksdk>=0.21.0,<0.27.0
 diskimage-builder>=2.0.0
 voluptuous
 kazoo