diff --git a/requirements.txt b/requirements.txt
index 4aad25b..7b1fe7c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -33,7 +33,7 @@ mkl-fft==1.0.0
 mkl-random==1.0.1
 nbconvert==5.3.1
 nbformat==4.4.0
-notebook==5.5.0
+notebook==6.4.12
 numpy==1.14.5
 pandas==0.23.1
 pandocfilters==1.4.2