diff --git a/packages/application-extension/style/base.css b/packages/application-extension/style/base.css
index 00ff142ce9..e7aba6ad3e 100644
--- a/packages/application-extension/style/base.css
+++ b/packages/application-extension/style/base.css
@@ -16,3 +16,10 @@
 .jp-Toolbar > .jp-Toolbar-item {
   height: unset;
 }
+
+#jp-UserMenu {
+  flex: 0 0 auto;
+  display: flex;
+  text-align: center;
+  margin-top: 8px;
+}