diff --git a/builder/main.py b/builder/main.py
index 60b9231..8bcdd2a 100644
--- a/builder/main.py
+++ b/builder/main.py
@@ -237,7 +237,7 @@ def _jlink_cmd_script(env, source):
         if not isdir(build_dir):
             makedirs(build_dir)
         script_path = join(build_dir, "upload.jlink")
-        commands = ["h", "loadbin %s,0x0" % source, "r", "q"]
+        commands = ["h", "loadfile %s" % source, "r", "q"]
         with open(script_path, "w") as fp:
             fp.write("\n".join(commands))
         return script_path