diff --git a/src/frontend/index.html b/src/frontend/index.html
index 4469aae..73fd8f1 100644
--- a/src/frontend/index.html
+++ b/src/frontend/index.html
@@ -286,6 +286,7 @@
 
     setupBrightnessControl();
     connectTerminal();
+    updateBrightness(0);
     initGhosttyVT();
   </script>
 </body>