fix

you21979 · Jan 25, 2017 · bcb9143 · bcb9143
1 parent ddd73f7
commit bcb9143
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/README.md b/README.md
@@ -12,6 +12,13 @@ npm i bitcoin-util-fee
 
 ## simple transaction-fee calculate usage
 
+please install [bitcoinfees-21co](https://www.npmjs.com/package/bitcoinfees-21co)
+
+```
+npm i bitcoinfees-21co
+```
+
+
 ### P2PKH
 
 ```