diff --git a/capsnet-arch/requirements.txt b/capsnet-arch/requirements.txt
index 8da22e5..07f998f 100644
--- a/capsnet-arch/requirements.txt
+++ b/capsnet-arch/requirements.txt
@@ -45,7 +45,7 @@ mistune==0.8.4
 mock==3.0.5
 nbconvert==5.5.0
 nbformat==4.4.0
-notebook==5.7.8
+notebook==6.4.12
 numpy==1.16.4
 opt-einsum==3.2.1
 pandocfilters==1.4.2