diff --git a/src/vpn_manager_globalprotect/vpnc.py b/src/vpn_manager_globalprotect/vpnc.py
index b4dd5a3..a15f5b3 100644
--- a/src/vpn_manager_globalprotect/vpnc.py
+++ b/src/vpn_manager_globalprotect/vpnc.py
@@ -162,8 +162,8 @@ class Config:
                 "Kind=tun",
                 "[Network]",
                 f"Address={self.internal_ipv4_address}",
-                f"DNS={' '.join(self.internal_ipv4_dns)}",
-                f"Domains={self.default_domain} {' '.join(self.search_domains)}",
+                f"DNS={' '.join(str(self.internal_ipv4_dns))}",
+                f"Domains={self.default_domain} {' '.join(str(self.search_domains))}",
                 "[Route]",
                 "Gateway=0.0.0.0",
                 "GatewayOnLink=yes",