diff --git a/varnish-cache/tasks/main.yml b/varnish-cache/tasks/main.yml
index 40d1337a..0c48cfde 100644
--- a/varnish-cache/tasks/main.yml
+++ b/varnish-cache/tasks/main.yml
@@ -1,7 +1,7 @@
 ---
 - name: Install the required packages needed by the external varnish repo
   apt: pkg={{ item }} state=present
-  with_items: varnish_repo_requirements
+  with_items: '{{ varnish_repo_requirements }}'
   when: varnish_repo
   tags: varnish
 
@@ -24,12 +24,12 @@
   
 - name: Install the varnish package
   apt: pkg={{ item }} state={{ varnish_pkg_state }}
-  with_items: varnish_pkg_name
+  with_items: '{{ varnish_pkg_name }}'
   tags: varnish
 
 - name: Configure some kernel parameters via sysctl
   sysctl: name={{ item.name }} value={{ item.value }} sysctl_file=/etc/sysctl.d/{{ varnish_sysctl_file }} reload=yes state=present
-  with_items: varnish_sysctl_kernel_parameters
+  with_items: '{{ varnish_sysctl_kernel_parameters }}'
   when: varnish_set_sysctl_params
   tags: [ 'varnish', 'varnishconf', 'sysctl' ]