diff --git a/config/application.rb b/config/application.rb
index e4e0097..d062d60 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -57,6 +57,9 @@ module RedmineApp
     # Sets the Content-Length header on responses with fixed-length bodies
     config.middleware.use Rack::ContentLength
 
+    # Verify validity of user sessions
+    config.redmine_verify_sessions = true
+
     # Specific cache for search results, the default file store cache is not
     # a good option as it could grow fast. A memory store (32MB max) is used
     # as the default. If you're running multiple server processes, it's