diff --git a/tasks/keystone_install.yml b/tasks/keystone_install.yml
index 591f5287..e791aa1b 100644
--- a/tasks/keystone_install.yml
+++ b/tasks/keystone_install.yml
@@ -44,7 +44,7 @@
 
 - name: Install required pip packages
   pip:
-    name: "{{ keystone_requires_pip_packages | join(' ') }}"
+    name: "{{ keystone_requires_pip_packages }}"
     state: "{{ keystone_pip_package_state }}"
     extra_args: >-
       {{ (pip_install_upper_constraints is defined) | ternary('--constraint ' + pip_install_upper_constraints | default(''),'') }}
@@ -89,7 +89,7 @@
 
 - name: Install pip packages
   pip:
-    name: "{{ keystone_pip_packages | join(' ') }}"
+    name: "{{ keystone_pip_packages }}"
     state: "{{ keystone_pip_package_state }}"
     virtualenv: "{{ keystone_bin | dirname }}"
     virtualenv_site_packages: "no"