diff --git a/requirements.txt b/requirements.txt
index 8712f72..ecbba1f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -37,7 +37,7 @@ mistune==0.8.3
 nbconvert==5.4.0
 nbformat==4.4.0
 nltk==3.4.5
-notebook==6.1.5
+notebook==6.4.12
 numpy==1.15.1
 pandocfilters==1.4.2
 parso==0.3.1