diff --git a/lib/redmine/wiki_formatting/common_mark/sanitization_filter.rb b/lib/redmine/wiki_formatting/common_mark/sanitization_filter.rb
index 24d8eaefd..32b839122 100644
--- a/lib/redmine/wiki_formatting/common_mark/sanitization_filter.rb
+++ b/lib/redmine/wiki_formatting/common_mark/sanitization_filter.rb
@@ -121,7 +121,7 @@ module Redmine
                 margin margin-left margin-right margin-top margin-bottom
                 border border-left border-right border-top border-bottom border-radius border-style border-collapse border-spacing
                 font font-style font-variant font-weight font-stretch font-size line-height font-family
-                text-align
+                text-align text-decoration
                 float
               ].freeze
             }
diff --git a/lib/redmine/wiki_formatting/textile/redcloth3.rb b/lib/redmine/wiki_formatting/textile/redcloth3.rb
index 71261334c..c171878dd 100644
--- a/lib/redmine/wiki_formatting/textile/redcloth3.rb
+++ b/lib/redmine/wiki_formatting/textile/redcloth3.rb
@@ -511,7 +511,7 @@ class RedCloth3 < String
         atts
     end
 
-    STYLES_RE = /^(color|(min-|max-)?+(width|height)|border|background|padding|margin|font|text|float)(-[a-z]+)*:\s*((\d+%?|\d+px|\d+(\.\d+)?em|#[0-9a-f]+|[a-z]+)\s*)+$/i
+    STYLES_RE = /^(color|(min-|max-)?+(width|height)|border|background|padding|margin|font|text|float)(-[a-z]+)*:\s*((\d+%?|\d+px|\d+(\.\d+)?em|#[0-9a-f]+|[a-z]+(?:-[a-z]+)*)\s*)+$/i
 
     def sanitize_styles(str)
       styles = str.split(";").map(&:strip)
diff --git a/test/unit/lib/redmine/wiki_formatting/common_mark/sanitization_filter_test.rb b/test/unit/lib/redmine/wiki_formatting/common_mark/sanitization_filter_test.rb
index 22afc3353..1cc50eaca 100644
--- a/test/unit/lib/redmine/wiki_formatting/common_mark/sanitization_filter_test.rb
+++ b/test/unit/lib/redmine/wiki_formatting/common_mark/sanitization_filter_test.rb
@@ -131,7 +131,7 @@ if Object.const_defined?(:Commonmarker)
       ],
       [
         '<b>Lo<!-- comment -->rem</b> <a href="pants" title="foo" style="text-decoration: underline;">ipsum</a> <a href="http://example.com/"><strong>dolor</strong></a> sit<br/>amet <style>.foo { color: #fff; }</style> <script>alert("hello world");</script>',
-        '<b>Lorem</b> <a href="pants" title="foo">ipsum</a> <a href="http://example.com/"><strong>dolor</strong></a> sit<br>amet .foo { color: #fff; } '
+        '<b>Lorem</b> <a href="pants" title="foo" style="text-decoration: underline;">ipsum</a> <a href="http://example.com/"><strong>dolor</strong></a> sit<br>amet .foo { color: #fff; } '
       ],
       [
         'Lo<!-- comment -->rem</b> <a href=pants title="foo>ipsum <a href="http://example.com/"><strong>dolor</a></strong> sit<br/>amet <script>alert("hello world");',
diff --git a/test/unit/lib/redmine/wiki_formatting/textile_formatter_test.rb b/test/unit/lib/redmine/wiki_formatting/textile_formatter_test.rb
index 5678067dd..40365c2bf 100644
--- a/test/unit/lib/redmine/wiki_formatting/textile_formatter_test.rb
+++ b/test/unit/lib/redmine/wiki_formatting/textile_formatter_test.rb
@@ -86,6 +86,7 @@ class Redmine::WikiFormatting::TextileFormatterTest < Redmine::HelperTest
         'p{max-width:100px}. text'     => '<p style="max-width:100px;">text</p>',
         'p{height:40px}. text'         => '<p style="height:40px;">text</p>',
         'p{max-height:80px}. text'     => '<p style="max-height:80px;">text</p>',
+        'p{text-decoration: line-through}. text'     => '<p style="text-decoration: line-through;">text</p>',
       },
       false
     )