diff --git a/src/DebugBar/Resources/debugbar.css b/src/DebugBar/Resources/debugbar.css
index c4d3269..54f6d00 100644
--- a/src/DebugBar/Resources/debugbar.css
+++ b/src/DebugBar/Resources/debugbar.css
@@ -106,6 +106,8 @@ select.phpdebugbar-datasets-switcher {
   display: none;
   margin: 2px 0 0 7px;
   max-width: 200px;
+  max-height: 23px;
+  padding: 0;
 }
 
 /* -------------------------------------- */