diff --git a/README.md b/README.md
index 8201263..ac09bb1 100644
--- a/README.md
+++ b/README.md
@@ -90,5 +90,9 @@ telnet localhost 3000
 ----
 
 ### License
-The material in this repository is licensed under the [Creative Commons Attribution-Noncommercial 3.0 license](http://creativecommons.org/licenses/by-nc/3.0/). All code is dedicated to the public domain. If your country does not recognize my right to dedicate work to the public domain, you may the [MIT license](http://opensource.org/licenses/MIT).
+
+<a rel="license" href="http://creativecommons.org/licenses/by-sa/4.0/"><img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by-sa/4.0/88x31.png" /></a><br />
+
+This work is licensed under a [Creative Commons Attribution-ShareAlike 4.0 International License](http://creativecommons.org/licenses/by-sa/4.0/)
+