diff --git a/roles/install_monitoring/tasks/install_munin.yml b/roles/install_monitoring/tasks/install_munin.yml
index cf2bfc2..1b442dc 100644
--- a/roles/install_monitoring/tasks/install_munin.yml
+++ b/roles/install_monitoring/tasks/install_munin.yml
@@ -41,6 +41,11 @@
       name: perl-lwp-protocol-https
       state: present
 
+- name: install perl-json
+  pacman:
+      name: perl-json
+      state: present
+
 - name: enable munin plugins
   file:
       path: /etc/munin/plugins/{{ item.name }}