diff --git a/notebook/requirements.txt b/notebook/requirements.txt
index d2e4df7..a933758 100644
--- a/notebook/requirements.txt
+++ b/notebook/requirements.txt
@@ -10,7 +10,7 @@ pyarrow==0.12.0
 pyspark==2.3.2
 seaborn==0.9.0
 matplotlib==3.0.3
-flask==1.0.2
+flask==2.3.2
 tensorflow==1.10.0
 pillow==6.0.0
 boto3==1.9.139