diff --git a/app/dashboard.py b/app/dashboard.py
index c0fe436..705a650 100644
--- a/app/dashboard.py
+++ b/app/dashboard.py
@@ -97,7 +97,7 @@ df_results = load_results()
 def run_solver_subprocess(time_limit_sec, output_placeholder):
     """Spawns the optimization worker and streams logs to the UI."""
     process = subprocess.Popen(
-        ["uv", "run", "python", "-u", "solver_worker.py", str(time_limit_sec)],
+        ["uv", "run", "python", "-u", "src/fleet_assignment/optimizer.py", str(time_limit_sec)],
         stdout=subprocess.PIPE,
         stderr=subprocess.STDOUT,
         text=True,