diff --git a/data_scientist/project_4_analyzing_subway_data/requirements.txt b/data_scientist/project_4_analyzing_subway_data/requirements.txt
index 8146819..94aa34b 100644
--- a/data_scientist/project_4_analyzing_subway_data/requirements.txt
+++ b/data_scientist/project_4_analyzing_subway_data/requirements.txt
@@ -31,7 +31,7 @@ lxml==4.4.0
 markupsafe==1.1.1
 matplotlib==3.1.1
 mistune==0.8.4
-nbconvert==5.5.0
+nbconvert==6.5.1
 nbformat==4.4.0
 notebook==6.0.0
 numpy==1.17.0