diff --git a/lib/web/auth/gitlab/index.js b/lib/web/auth/gitlab/index.js
index 4cebbc10..22611eed 100644
--- a/lib/web/auth/gitlab/index.js
+++ b/lib/web/auth/gitlab/index.js
@@ -7,7 +7,7 @@ const config = require('../../../config')
 const response = require('../../../response')
 const { setReturnToFromReferer, passportGeneralCallback } = require('../utils')
 
-let gitlabAuth = module.exports = Router()
+const gitlabAuth = module.exports = Router()
 
 passport.use(new GitlabStrategy({
   baseURL: config.gitlab.baseURL,