diff --git a/bitcoin/requirements.txt b/bitcoin/requirements.txt
index 55c1eaa..ec61fcf 100644
--- a/bitcoin/requirements.txt
+++ b/bitcoin/requirements.txt
@@ -28,7 +28,7 @@ mistune==0.8.3
 more-itertools==4.3.0
 nbconvert==5.4.0
 nbformat==4.4.0
-notebook==5.7.0
+notebook==6.4.10
 pandocfilters==1.4.2
 parso==0.3.1
 pexpect==4.6.0