diff --git a/src/gitlab.ts b/src/gitlab.ts
index 58c5b47..27bbe5e 100644
--- a/src/gitlab.ts
+++ b/src/gitlab.ts
@@ -97,7 +97,7 @@ export default class VerdaccioGitLab implements VerdaccioGitLabPlugin {
 
     GitlabAPI.Users.current()
       .then(response => {
-        if (user !== response.username) {
+        if (user !== response.username.toLowerCase()) {
           return cb(getUnauthorized('wrong gitlab username'));
         }