diff --git a/requirements.txt b/requirements.txt
index 31b652000..829bd8e3a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 certifi==2021.10.8
 babel==2.9.1
 flask-babel==2.0.0
-flask==2.0.3
+flask==2.1.1
 jinja2==3.1.0
 lxml==4.8.0
 pygments==2.11.2