diff --git a/proj1/requirements.txt b/proj1/requirements.txt
index e911f7c..7380048 100644
--- a/proj1/requirements.txt
+++ b/proj1/requirements.txt
@@ -98,7 +98,7 @@ nbformat==4.4.0
 networkx==2.0
 nltk==3.2.4
 nose==1.3.7
-notebook==5.0.0
+notebook==6.4.12
 numba==0.35.0+10.g143f70e90.dirty
 numexpr==2.6.2
 numpy==1.13.3