diff --git a/requirements.txt b/requirements.txt
index 21bb889..ff96721 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -64,7 +64,7 @@ msgpack==0.5.6
 multidict==4.4.2
 nbconvert==5.4.0
 nbformat==4.4.0
-notebook==5.7.0
+notebook==6.4.12
 openapi-codec==1.3.2
 pandocfilters==1.4.2
 parso==0.3.1