diff --git a/stack.sh b/stack.sh
index cd1c200..375be28 100755
--- a/stack.sh
+++ b/stack.sh
@@ -780,7 +780,7 @@
     git_clone_by_name "python-openstackclient"
     setup_dev_lib "python-openstackclient"
 else
-    pip_install python-openstackclient
+    pip_install 'python-openstackclient>=1.0.0'
 fi