diff --git a/lib/noosfero/core_ext/string.rb b/lib/noosfero/core_ext/string.rb
index 1e4e649..157aace 100644
--- a/lib/noosfero/core_ext/string.rb
+++ b/lib/noosfero/core_ext/string.rb
@@ -37,7 +37,7 @@ class String
   end
 
   def to_slug
-    transliterate.downcase.gsub(/^\d+/,'').gsub( /[^a-z0-9~\s:;+=_.-]/, '').gsub(/[\s:;+=_-]+/, '-').gsub(/-$/, '').gsub(/^-/, '').to_s
+    transliterate.downcase.gsub(/^\d+/,'').gsub( /[^a-z0-9~\s:;+=_."'`-]/, '').gsub(/[\s:;+=_"'`-]+/, '-').gsub(/-$/, '').gsub(/^-/, '').to_s
   end
 
 end
diff --git a/test/unit/slug_test.rb b/test/unit/slug_test.rb
index 85197ef..427b9f2 100644
--- a/test/unit/slug_test.rb
+++ b/test/unit/slug_test.rb
@@ -23,4 +23,8 @@ class SlugTest < Test::Unit::TestCase
     assert_equal 'a.b', 'a.b'.to_slug
   end
 
+  should 'turn quote and apostrophe into dashes' do
+    assert_equal 'a-b-c-d', 'a"b\'c`d'.to_slug
+  end
+
 end
--
libgit2 0.21.2