diff --git a/README.md b/README.md
index 455c165..e3a4c75 100644
--- a/README.md
+++ b/README.md
@@ -57,4 +57,5 @@ signature perform the following:
 
 ## License
 
-Package btcutil is licensed under the liberal ISC License.
+Package btcutil is licensed under the [copyfree](http://copyfree.org) ISC
+License.
diff --git a/coinset/README.md b/coinset/README.md
index 753cd9e..aa70def 100644
--- a/coinset/README.md
+++ b/coinset/README.md
@@ -76,4 +76,5 @@ transaction and transmit it to the network.
 
 ## License
 
-Package coinset is licensed under the liberal ISC License.
+Package coinset is licensed under the [copyfree](http://copyfree.org) ISC
+License.