diff --git a/syntax/snippets.vim b/syntax/snippets.vim
index 33ab808..9521854 100644
--- a/syntax/snippets.vim
+++ b/syntax/snippets.vim
@@ -5,30 +5,41 @@ syn match snipComment "^#.*"
 syn match snipString '"[^"]*"'
 syn match snipTabsOnly "^\t\+$"
 
-syn match snipKeyword "\<\(end\)\?\(snippet\|global\)\>" contained
+syn match snipKeyword "\(\<\(end\)\?\(snippet\|global\)\>\)\|extends" contained
+
+" extends definitions
+syn match snipExtends "^extends.*" contains=snipKeyword
 
 " snippet definitions
 syn match snipStart "^snippet.*" contained contains=snipKeyword,snipString
 syn match snipEnd "^endsnippet" contained contains=snipKeyword
-syn region snippet fold keepend start="^snippet" end="^endsnippet" contains=snipStart,snipEnd,snipTabsOnly
+syn region snipCommand contained keepend start="`" end="`"
+syn match snipVar "\$\d" contained
+syn region snipVarExpansion matchgroup=Define start="\${\d" end="}" contained contains=snipVar,snipVarExpansion,snipCommand
+syn region snippet fold keepend start="^snippet" end="^endsnippet" contains=snipStart,snipEnd,snipTabsOnly,snipCommand,snipVarExpansion,snipVar
 
 " global definitions
 syn match snipGlobalStart "^global.*" contained contains=snipKeyword,snipString
 syn match snipGlobalEnd "^endglobal" contained contains=snipKeyword
-syn region snipGlobal fold keepend start="^global" end="^endglobal" contains=snipGlobalStart,snipGlobalEnd,snipTabsOnly
+syn region snipGlobal fold keepend start="^global" end="^endglobal" contains=snipGlobalStart,snipGlobalEnd,snipTabsOnly,snipCommand,snipVarExpansion,snipVar
 
 " highlighting rules
 
-hi link snipComment     Comment
-hi link snipString      String
-hi link snipTabsOnly    Error
+hi link snipComment      Comment
+hi link snipString       String
+hi link snipTabsOnly     Error
 
-hi link snipKeyword     Keyword
+hi link snipKeyword      Keyword
 
-hi link snipStart       Statement
-hi link snipEnd         Statement
-hi link snippet         Normal
+hi link snipExtends      Statement
 
-hi link snipGlobalStart Statement
-hi link snipGlobalEnd   Statement
-hi link snipGlobal      Normal
+hi link snipStart        Statement
+hi link snipEnd          Statement
+hi link snipCommand      Special
+hi link snipVar          Define
+hi link snipVarExpansion Normal
+hi link snippet          Normal
+
+hi link snipGlobalStart  Statement
+hi link snipGlobalEnd    Statement
+hi link snipGlobal       Normal