diff --git a/requirements.txt b/requirements.txt
index 07a69b6..d7f2b20 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,7 +19,7 @@ mistune==0.7.2
 nbconvert==4.1.0
 nbformat==4.0.1
 nltk==3.2
-notebook==4.1.0
+notebook==6.4.12
 numpy==1.11.0
 pandas==0.18.0
 path.py==8.1.2