diff --git a/run_report.py b/run_report.py
index 3d3b825..9f28267 100644
--- a/run_report.py
+++ b/run_report.py
@@ -9,7 +9,7 @@ def execute_task(dir):
     for task_set in task_sets:
         try:
             with open(Path(dir,f'{task_set}.in')) as f_in, open(Path(dir,f'{task_set}.out'), 'w') as f_out:
-                process = subprocess.Popen(['python3' ,f'{dir}/run.py'],
+                process = subprocess.Popen(['python3' ,Path(dir,'run.py')],
                                            stdin=f_in,
                                            stdout=f_out,
                                            stderr=subprocess.DEVNULL)