diff --git a/README.md b/README.md
index d650eb3..31fa5ae 100644
--- a/README.md
+++ b/README.md
@@ -128,8 +128,8 @@ Bugs and Issues
 [Encryption]:        https://github.com/shadowsocks/shadowsocks/wiki/Encryption
 [iOS]:               https://github.com/shadowsocks/shadowsocks-iOS/wiki/Help
 [Issue Tracker]:     https://github.com/shadowsocks/shadowsocks/issues?state=open
-[Mailing list]:      http://groups.google.com/group/shadowsocks
-[OpenSSL for Windows]: http://slproweb.com/products/Win32OpenSSL.html
+[Mailing list]:      https://groups.google.com/group/shadowsocks
+[OpenSSL for Windows]: https://slproweb.com/products/Win32OpenSSL.html
 [OpenWRT]:           https://github.com/shadowsocks/shadowsocks/wiki/Ports-and-Clients#openwrt
 [OS X]:              https://github.com/shadowsocks/shadowsocks-iOS/wiki/Shadowsocks-for-OSX-Help
 [PyPI]:              https://pypi.python.org/pypi/shadowsocks