diff --git a/appliances/pfsense.gns3a b/appliances/pfsense.gns3a
index 26582ba..ff640bf 100644
--- a/appliances/pfsense.gns3a
+++ b/appliances/pfsense.gns3a
@@ -66,7 +66,7 @@
             "name": "2.5.2",
             "images": {
                 "hda_disk_image": "empty100G.qcow2",
-                "cdrom_image": "pfSense-CE-2.5.2-RELEASE-amd64.isoo"
+                "cdrom_image": "pfSense-CE-2.5.2-RELEASE-amd64.iso"
             }
         },
         {