diff --git a/lib/noosfero.rb b/lib/noosfero.rb
index 42fafb8..6251a42 100644
--- a/lib/noosfero.rb
+++ b/lib/noosfero.rb
@@ -1,3 +1,5 @@
+# encoding: utf-8
+
 require 'fast_gettext'
 
 module Noosfero
diff --git a/lib/noosfero/core_ext/string.rb b/lib/noosfero/core_ext/string.rb
index 943489e..849ea1b 100644
--- a/lib/noosfero/core_ext/string.rb
+++ b/lib/noosfero/core_ext/string.rb
@@ -1,3 +1,5 @@
+# encoding: utf-8
+
 class String
 
   TRANSLITERATIONS = {
--
libgit2 0.21.2