diff --git a/markdown/bitcoin.md b/markdown/bitcoin.md
index 6749b6e..8f45697 100644
--- a/markdown/bitcoin.md
+++ b/markdown/bitcoin.md
@@ -1,5 +1,5 @@
 
-# Bitcoin: A Peer-to-Peer Electronic Cash System
+# Bitcoin: A Peer-to-Peer Electronic Cash Systems
 
 Satoshi Nakamoto  
 satoshin@gmx.com