diff --git a/const.py b/const.py
index 69ae539..efa30e9 100755
--- a/const.py
+++ b/const.py
@@ -81,7 +81,7 @@ BCST    = b'BCST'
 BCVE    = b'BCVE'
 
 #Protocol version
-VER     = 3
+VER     = 4
 
 # Higheset peer ID permitted by HBP
 PEER_MAX = 4294967295
diff --git a/doc/FreeDMR FBP Proto v4.ods b/doc/FreeDMR FBP Proto v4.ods
new file mode 100644
index 0000000..cc0e88a
Binary files /dev/null and b/doc/FreeDMR FBP Proto v4.ods differ