diff --git a/app/controllers/wopi_controller.rb b/app/controllers/wopi_controller.rb
index 3bc46e148..e61ccbadb 100644
--- a/app/controllers/wopi_controller.rb
+++ b/app/controllers/wopi_controller.rb
@@ -79,7 +79,7 @@ class WopiController < ActionController::Base
     }
     response.headers['X-WOPI-HostEndpoint'] = ENV['WOPI_ENDPOINT_URL']
     response.headers['X-WOPI-MachineName'] = ENV['WOPI_ENDPOINT_URL']
-    response.headers['X-WOPI-ServerVersion'] = APP_VERSION
+    response.headers['X-WOPI-ServerVersion'] = Constants::APP_VERSION
     render json: msg and return
   end