diff --git a/doc/requirements.txt b/doc/requirements.txt
index 2f7c209..a200eec 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -4,7 +4,7 @@ Flask==1.1.1
 itsdangerous==1.1.0
 Jinja2==2.10.1
 MarkupSafe==1.1.1
-numpy==1.17.2
+numpy==1.22.0
 pandas==0.25.1
 python-dateutil==2.8.0
 pytz==2019.3