diff --git a/etc/conf/javascript.vim b/etc/conf/javascript.vim
index 492524fd..796e3615 100644
--- a/etc/conf/javascript.vim
+++ b/etc/conf/javascript.vim
@@ -4,13 +4,18 @@ syntax match Comment "\<help: \"[^\"]*\""
 
 highlight canConst    ctermfg=yellow
 syntax match canConst "\<can\>"
+syntax match canConst "\<sub\>"
+syntax match canConst "\<sup\>"
+syntax match canConst "\<you\>"
 syntax match canConst "\<msg\>"
 
 highlight msgConst    ctermfg=cyan
 syntax match msgConst "\<m\.[a-z0-9A-Z_.]*"
 syntax match msgConst "\<msg\.[a-z0-9A-Z_.]*"
-syntax match msgConst "\<sub\.[a-z0-9A-Z_.]*"
 syntax match msgConst "\<can\.[a-z0-9A-Z_]*"
+syntax match msgConst "\<sub\.[a-z0-9A-Z_.]*"
+syntax match msgConst "\<sup\.[a-z0-9A-Z_.]*"
+syntax match msgConst "\<you\.[a-z0-9A-Z_]*"
 
 syntax match canConst "\<can\.base"
 syntax match canConst "\<can\.core"