diff --git a/README.md b/README.md
index 74c7dfe9..717519c5 100644
--- a/README.md
+++ b/README.md
@@ -125,4 +125,5 @@ signature perform the following:
 
 ## License
 
-Package btcwire is licensed under the liberal ISC License.
+Package btcwire is licensed under the [copyfree](http://copyfree.org) ISC
+License.