diff --git a/docs/protocol.txt b/docs/protocol.txt
index b1b5185..0ef8eef 100644
--- a/docs/protocol.txt
+++ b/docs/protocol.txt
@@ -40,8 +40,8 @@ Types for controller:
       [ X B B B  B B B B ]
           - - ----------
           | ↓  reserved
-					↓ module ID
-	     type
+          ↓ module ID
+       type
 
     - 1 hello
       [ X B B B  B B B B ]
@@ -66,10 +66,10 @@ Types for controller:
           end time ↓ ↓ reserved
             #strikes #max strikes
 
-		- 7 info start
+    - 7 info start
       [ X B B B  B B B B ]
           --------------
-					   reserved
+             reserved
 
     - 8-255 reserved