diff --git a/init.rb b/init.rb
index 865b0e9..4b6c83f 100644
--- a/init.rb
+++ b/init.rb
@@ -1,6 +1,7 @@
 require 'redmine'
 require 'redmine_openid_connect/application_controller_patch'
 require 'redmine_openid_connect/account_controller_patch'
+require 'redmine_openid_connect/users_controller_patch'
 require 'redmine_openid_connect/hooks'
 
 Redmine::Plugin.register :redmine_openid_connect do
@@ -17,4 +18,5 @@
 Rails.configuration.to_prepare do
   ApplicationController.prepend(RedmineOpenidConnect::ApplicationControllerPatch)
   AccountController.prepend(RedmineOpenidConnect::AccountControllerPatch)
+  UsersController.prepend(RedmineOpenidConnect::UsersControllerPatch)
 end
diff --git a/lib/redmine_openid_connect/users_controller_patch.rb b/lib/redmine_openid_connect/users_controller_patch.rb
new file mode 100644
index 0000000..40fd69d
--- /dev/null
+++ b/lib/redmine_openid_connect/users_controller_patch.rb
@@ -0,0 +1,9 @@
+module RedmineOpenidConnect
+  module UsersControllerPatch
+
+    def destroy
+      OicSession.where("user_id = ? ", @user.id).delete_all
+      super
+    end
+  end    
+end