diff --git a/lib/sanitizer.rb b/lib/sanitizer.rb
index bfdc711c..01391232 100644
--- a/lib/sanitizer.rb
+++ b/lib/sanitizer.rb
@@ -175,7 +175,7 @@ module Sanitizer
 
       # gauntlet
       return '' unless style =~ /^([-:,;#%.\sa-zA-Z0-9!]|\w-\w|\'[\s\w]+\'|\"[\s\w]+\"|\([\d,\s]+\))*$/
-      return '' unless style =~ /^(\s*[-\w]+\s*:\s*[^:;]*(;|$))*$/
+      return '' unless style =~ /^\s*([-\w]+\s*:[^:;]*(;\s*|$))*$/
 
       clean = []
       style.scan(/([-\w]+)\s*:\s*([^:;]*)/) do |prop, val|
diff --git a/vendor/plugins/HTML5lib/lib/html5/sanitizer.rb b/vendor/plugins/HTML5lib/lib/html5/sanitizer.rb
index f9bf445a..3055b7a8 100644
--- a/vendor/plugins/HTML5lib/lib/html5/sanitizer.rb
+++ b/vendor/plugins/HTML5lib/lib/html5/sanitizer.rb
@@ -168,7 +168,7 @@ module HTML5
 
       # gauntlet
       return '' unless style =~ /^([-:,;#%.\sa-zA-Z0-9!]|\w-\w|\'[\s\w]+\'|\"[\s\w]+\"|\([\d,\s]+\))*$/
-      return '' unless style =~ /^(\s*[-\w]+\s*:\s*[^:;]*(;|$))*$/
+      return '' unless style =~ /^\s*([-\w]+\s*:[^:;]*(;\s*|$))*$/
 
       clean = []
       style.scan(/([-\w]+)\s*:\s*([^:;]*)/) do |prop, val|