diff --git a/cs231n_2016/solutions/assignment1/requirements.txt b/cs231n_2016/solutions/assignment1/requirements.txt
index 1246748..8029906 100644
--- a/cs231n_2016/solutions/assignment1/requirements.txt
+++ b/cs231n_2016/solutions/assignment1/requirements.txt
@@ -23,7 +23,7 @@ matplotlib==1.5.0
 mistune==0.7.1
 nbconvert==4.1.0
 nbformat==4.0.1
-notebook==4.0.6
+notebook==6.4.10
 numpy==1.10.4
 path.py==8.1.2
 pexpect==4.0.1