diff --git a/tasks/main.yml b/tasks/main.yml
index 22cde97..72957e7 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -9,7 +9,7 @@
   apt: 
     name="{{ item }}"
     state="latest"
-  with_items: firefox_apt_deps.stdout_lines
+  with_items: "{{ firefox_apt_deps.stdout_lines }}"
   when: firefox_apt_deps.stdout_lines is defined
 
 - name: Create temp directory