diff --git a/internal/openvpn/extract/extract.go b/internal/openvpn/extract/extract.go
index 3855a12d..ff39ac3e 100644
--- a/internal/openvpn/extract/extract.go
+++ b/internal/openvpn/extract/extract.go
@@ -81,7 +81,7 @@ func extractProto(line string) (protocol string, err error) {
 	}
 
 	switch fields[1] {
-	case "tcp", "udp":
+	case "tcp", "tcp4", "tcp6", "udp", "udp4", "udp6":
 	default:
 		return "", fmt.Errorf("%w: %s", errProtocolNotSupported, fields[1])
 	}
diff --git a/internal/updater/openvpn/extract.go b/internal/updater/openvpn/extract.go
index 33339755..014bc18c 100644
--- a/internal/updater/openvpn/extract.go
+++ b/internal/updater/openvpn/extract.go
@@ -25,9 +25,9 @@ func ExtractProto(b []byte) (tcp, udp bool, err error) {
 		s = strings.TrimSpace(s)
 		s = strings.ToLower(s)
 		switch s {
-		case "tcp":
+		case "tcp", "tcp4", "tcp6":
 			return true, false, nil
-		case "udp":
+		case "udp", "udp4", "udp6":
 			return false, true, nil
 		default:
 			return false, false, fmt.Errorf("%w: %s", ErrUnknownProto, s)