diff --git a/tasks/firewall.yaml b/tasks/firewall.yaml
index b5dd07e..e5544dd 100644
--- a/tasks/firewall.yaml
+++ b/tasks/firewall.yaml
@@ -18,7 +18,7 @@
 
         # remove and disable firewall
         - name: "remove and disable firewall"
-          when: "not __firewall_enable"
+          when: '__firewall_enable == "false"'
           block:
 
             # stop service
@@ -37,7 +37,7 @@
 
         # install and enable firewall
         - name: "install and enable firewall"
-          when: "__firewall_enable"
+          when: '__firewall_enable == "true"'
           block:
 
             # install ufw