diff --git a/www/src/app/pages/login/login.page.html b/www/src/app/pages/login/login.page.html
index 5ab2d6878..9bd227f1d 100644
--- a/www/src/app/pages/login/login.page.html
+++ b/www/src/app/pages/login/login.page.html
@@ -16,7 +16,7 @@
 
       <div class="row">
         <div class="col-xs-12">
-          <button type="submit" class="btn btn-primary btn-sm btn-block btn-flat" ng-disabled="loginForm.$invalid">Sign In</button>
+          <button type="submit" class="btn btn-primary btn-m btn-block" ng-disabled="loginForm.$invalid">Sign In</button>
         </div>
       </div>