diff --git a/js/script.js b/js/script.js
index 5d944b8..6b289ba 100644
--- a/js/script.js
+++ b/js/script.js
@@ -1,4 +1,4 @@
-import { ESPLoader, Transport } from "https://unpkg.com/esptool-js/bundle.js";
+import { ESPLoader, Transport } from "https://unpkg.com/esptool-js@0.5.1/bundle.js";
 
 const baudRates = [921600, 115200, 230400, 460800];
 
diff --git a/script/develop b/script/develop
index 6f6092b..732f1e8 100755
--- a/script/develop
+++ b/script/develop
@@ -8,10 +8,5 @@ set -e
 # Quit all background tasks when script exits
 trap "kill 0" EXIT
 
-# Run tsc once as rollup expects those files
-#npm exec -- tsc || true
-#npm exec -- rollup -c
-
-#npm exec -- tsc --watch &
 npm exec -- serve -p 5004 &
 wait