diff --git a/enem-2/requirements.txt b/enem-2/requirements.txt
index c1fefea..977191b 100644
--- a/enem-2/requirements.txt
+++ b/enem-2/requirements.txt
@@ -22,7 +22,7 @@ mistune==0.8.3
 more-itertools==4.2.0
 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