diff --git a/phc2sys.service b/phc2sys.service
index 8382589..992461d 100644
--- a/phc2sys.service
+++ b/phc2sys.service
@@ -25,7 +25,7 @@ ProtectKernelTunables=yes
 ProtectProc=invisible
 ProtectSystem=strict
 ReadWritePaths=/run
-RestrictAddressFamilies=AF_UNIX
+RestrictAddressFamilies=AF_INET AF_UNIX
 RestrictNamespaces=yes
 RestrictSUIDSGID=yes
 SystemCallArchitectures=native