diff --git a/tasks/install.yml b/tasks/install.yml
index c8b6bc2..c419bdb 100644
--- a/tasks/install.yml
+++ b/tasks/install.yml
@@ -15,7 +15,7 @@
     - name: Install python packages
       pip:
         name: "{{ item.name }}"
-        executable: "{{ item.exec | default('/usr/bin/pip' + ansible_python.version.major) }}"
+        executable: "{{ item.exec | default('/usr/bin/pip' + ansible_python.version.major | string) }}"
         state: present
       loop: "{{ dockerengine_packages_python }}"
       loop_control: