diff --git a/README.md b/README.md
index 6596253..1e765e2 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,10 @@ for the book, "The Go Programming Language"; see http://www.gopl.io.
 (At present, only gopl.io/ch1/helloworld is available.  The other
 programs will be published as soon as the book is printed.)
 
+All programs are licensed for use under the terms of
+Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0).
+<a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/4.0/"><img alt="Creative Commons License" style="border-width:0" src="https://i.creativecommons.org/l/by-nc-sa/4.0/88x31.png" /></a><br />This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/4.0/">Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License</a>.
+
 You can download, build, and run the programs with the following commands:
 
 	$ export GOPATH=$HOME/gobook            # choose workspace directory