diff --git a/app/models/invitation.rb b/app/models/invitation.rb
index f6be288..26a0490 100644
--- a/app/models/invitation.rb
+++ b/app/models/invitation.rb
@@ -20,7 +20,7 @@ class Invitation < Task
 
   before_create do |task|
     if task.message && !task.message.match(/<url>/)
-      task.message += task.message_to_accept_invitation
+      task.message += Invitation.default_message_to_accept_invitation
     end
   end
 
@@ -122,7 +122,7 @@ class Invitation < Task
     raise 'You should implement mail_template in a subclass'
   end
 
-  def message_to_accept_invitation
-    '<p>' + _('To accept invitation, please follow this link: <url>') + '</p>'
+  def self.default_message_to_accept_invitation
+    "\n\n" + _('To accept invitation, please follow this link: <url>')
   end
 end
diff --git a/test/unit/invitation_test.rb b/test/unit/invitation_test.rb
index 9e3f9a7..1a8d224 100644
--- a/test/unit/invitation_test.rb
+++ b/test/unit/invitation_test.rb
@@ -80,7 +80,7 @@ class InvitationTest < ActiveSupport::TestCase
       :friend => friend,
       :message => 'Hi <friend>, <user> is inviting you!'
     )
-    assert_equal "Hi <friend>, <user> is inviting you!#{invitation.message_to_accept_invitation}", invitation.message
+    assert_equal "Hi <friend>, <user> is inviting you!#{Invitation.default_message_to_accept_invitation}", invitation.message
   end
 
   should 'do nothing with message if user added url' do
@@ -95,6 +95,6 @@ class InvitationTest < ActiveSupport::TestCase
   end
 
   should 'have a message with url' do
-    assert_equal "<p>To accept invitation, please follow this link: <url></p>", Invitation.new.message_to_accept_invitation
+    assert_equal "\n\nTo accept invitation, please follow this link: <url>", Invitation.default_message_to_accept_invitation
   end
 end
--
libgit2 0.21.2