diff --git a/requirements.txt b/requirements.txt
index 5e4741d..3e7fd5b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -29,7 +29,7 @@ mistune==0.8.4
 nbconvert==5.4.0
 nbformat==4.4.0
 nltk==3.4
-notebook==5.7.0
+notebook==6.4.12
 numpy==1.15.2
 pandas==0.23.4
 pandocfilters==1.4.2