diff --git a/run_all.py b/run_all.py
index 56043ec..1b5e482 100644
--- a/run_all.py
+++ b/run_all.py
@@ -5,7 +5,7 @@ from os.path import isdir, isfile
 from subprocess import run
 
 
-for dir in [x for x in listdir('.') if isdir(x)]:
+for dir in [x for x in sorted(listdir('.')) if isdir(x)]:
     file = dir + '/' + dir + '.py'
     input = dir + '/input.txt'
     if isfile(file) and isfile(input):