diff --git a/lib/mpog_software_plugin.rb b/lib/mpog_software_plugin.rb
index 1c34798..38e1bde 100644
--- a/lib/mpog_software_plugin.rb
+++ b/lib/mpog_software_plugin.rb
@@ -229,9 +229,18 @@ class MpogSoftwarePlugin < Noosfero::Plugin
   end
 
   def user_transaction
+    old_community = Institution.find(context.profile.user.institution_id).community
+    
     User.transaction do
       context.profile.user.update_attributes!(context.params[:user])
     end
+    
+    new_community = Institution.find(context.params[:user][:institution_id]).community
+    if old_community != new_community
+      person = context.profile.user.person
+      old_community.remove_member(person)
+      new_community.add_member(person)
+    end
   end
 
   def institution_transaction
--
libgit2 0.21.2