diff --git a/pythonwhois/net.py b/pythonwhois/net.py
index 53f87ba..5b020ff 100644
--- a/pythonwhois/net.py
+++ b/pythonwhois/net.py
@@ -91,4 +91,5 @@ def whois_request(domain, server, port=43):
 		if len(data) == 0:
 			break
 		buff += data
+	sock.close()
 	return buff.decode("utf-8")