diff --git a/src/vpn_manager_globalprotect/vpnc.py b/src/vpn_manager_globalprotect/vpnc.py
index 2ca67d7..5d345a6 100644
--- a/src/vpn_manager_globalprotect/vpnc.py
+++ b/src/vpn_manager_globalprotect/vpnc.py
@@ -213,7 +213,7 @@ class Config:
                         self.write_exclusion(
                             dir,
                             ipaddress.IPv4Network(
-                                f"{'.'.join(route.get('Destination', [255, 255, 255, 255]))}/{route.get('DestinationPrefixLength', 32)}"
+                                f"{'.'.join(str(octet) for octet in route.get('Destination', [255, 255, 255, 255]))}/{route.get('DestinationPrefixLength', 32)}"
                             ),
                         )