diff --git a/packages/app/src/components/titlebar-tab-nav.css b/packages/app/src/components/titlebar-tab-nav.css
index eabf43b40f..553605b2af 100644
--- a/packages/app/src/components/titlebar-tab-nav.css
+++ b/packages/app/src/components/titlebar-tab-nav.css
@@ -16,7 +16,7 @@
     right: 8px;
     bottom: 0;
     left: 8px;
-    height: 2px;
+    height: 1px;
     pointer-events: none;
     border-radius: 2px 2px 0 0;
     background: var(--tab-color);