diff --git a/formules.py b/formules.py
index 0baf253..7d1c836 100644
--- a/formules.py
+++ b/formules.py
@@ -4,7 +4,7 @@ Created on Wed Jun 16 09:34:35 2021
 
 @author: -
 """
-import osa
+import os
 import pandas as pd
 import numpy as np
 import matplotlib.pyplot as plt