diff --git a/requirements.txt b/requirements.txt
index 5a7cf7c..57474db 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -66,7 +66,7 @@ msgpack==1.0.0
 nbconvert==5.6.1
 nbformat==5.0.7
 nltk==3.5
-notebook==6.1.1
+notebook==6.4.12
 numpy==1.19.1
 oauthlib==3.1.0
 OpenNMT-py==1.2.0