diff --git a/docs/network.rst b/docs/network.rst
index 5fa2740..7be09fb 100644
--- a/docs/network.rst
+++ b/docs/network.rst
@@ -29,9 +29,9 @@ Network
     Judge whether the given ``ip`` is IPV6 address.
 
     >>> from pydu.network import is_ipv6
-    >>> is_ipv4('fe80::9e5b:b149:e187:1a18')
+    >>> is_ipv6('fe80::9e5b:b149:e187:1a18')
     True
-    >>> is_ipv4('localhost.localdomain')
+    >>> is_ipv6('localhost.localdomain')
     False