diff --git a/requirements.txt b/requirements.txt
index deeea5d..e2dc77b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@
 #
 attrs==19.3.0
 click==6.7
-flask==1.0.2
+flask==2.3.2
 itsdangerous==1.1.0       # via flask
 jinja2==2.11.3            # via flask
 markupsafe==1.1.0         # via jinja2