remove cache from admin part

@@ -12,6 +12,7 @@ module Kanjai
 
     before_action :authenticate_admin_user!
     before_action :set_locale
+    before_action :set_cache_headers
 
     after_action :prepare_unobtrusive_flash
 
@@ -21,5 +22,11 @@ module Kanjai
       I18n.locale = :en
     end
 
+    def set_cache_headers
+      response.headers["Cache-Control"] = "no-cache, no-store"
+      response.headers["Pragma"] = "no-cache"
+      response.headers["Expires"] = "Mon, 01 Jan 1990 00:00:00 GMT"
+    end
+
   end
 end
\ No newline at end of file

 module Kanjai
-  VERSION = "0.0.229"
+  VERSION = "0.0.230"
 end