diff --git a/PROTOCOL.md b/PROTOCOL.md
index caffc708..cfc079d8 100644
--- a/PROTOCOL.md
+++ b/PROTOCOL.md
@@ -238,14 +238,14 @@ __Response__ : OK if source exists, with these additional fields :
 - **"volume"** (double) : volume of the requested source, on a linear scale (0.0 to 1.0)
 - **"muted"** (bool) : mute status of the requested source
 
-### "SetMute"
+#### "SetMute"
 Mutes or unmutes a specific source.
 
 __Request fields__ :
 - **"source"** (string) : the name of the source
 - **"mute"** (bool) : the desired mute status
 
-### "ToggleMute"
+#### "ToggleMute"
 Inverts the mute status of a specific source.
 
 __Request fields__ :