diff --git a/syntax/requirements.vim b/syntax/requirements.vim
index 7e82fcb..3c3d5c3 100644
--- a/syntax/requirements.vim
+++ b/syntax/requirements.vim
@@ -14,12 +14,14 @@ syn match requirementsCommandOption "\v^\[?--?[a-zA-Z\-]*\]?"
 syn match requirementsVersionSpecifiers "\v(\=\=\=?|\<\=?|\>\=?|\~\=|\!\=)"
 syn match requirementsPackageName "\v^([a-zA-Z0-9][a-zA-Z0-9\-_\.]*[a-zA-Z0-9])"
 syn match requirementsVersionControls "\v(git\+?|hg\+|svn\+|bzr\+)\S+"
+syn match requirementsURLs "\v\@\s\S+"
 
 hi link requirementsComment Comment
 hi link requirementsCommandOption Special
 hi link requirementsVersionSpecifiers Boolean
 hi link requirementsPackageName Identifier
-hi link requirementsVersionControls Identifier
+hi link requirementsVersionControls Underlined
+hi link requirementsURLs Underlined
 
 let b:current_syntax = "requirements"