diff --git a/1.Linear_model.py b/1.Linear_model.py
index 25db6c4..a0ebd43 100644
--- a/1.Linear_model.py
+++ b/1.Linear_model.py
@@ -13,6 +13,7 @@
 1.using least square method figure out linear regression
 '''
 import numpy as np
+from sklearn.learn_model import LinearRegression
 import matplotlib.pyplot as plt
 
 def linear_regression(x,y):