Update README.md

Leeon123 · web-flow · commit 76d014b61f27 · 2019-01-15T22:12:22.000+08:00
diff --git a/README.md b/README.md
@@ -14,6 +14,6 @@ Build up a easy P2P botnet with python3.
 
 Then, run the cnc.py:
 
-    python3 cnc.py
+    python3 cnc.py <port>
     
 At Last, run the bot.py in any python3 environment(IDE, codeanywhere,etc.) then the **Bot** is online.
