diff --git a/src/ui/web/css/left-panel.css b/src/ui/web/css/left-panel.css
index 6833341d..5a5240a2 100644
--- a/src/ui/web/css/left-panel.css
+++ b/src/ui/web/css/left-panel.css
@@ -27,6 +27,7 @@ limitations under the License.
     display: block;
     flex: 1;
     box-sizing: border-box;
+    min-width: 0;
 }
 
 .LeftPanel ul {