diff --git a/requirements.txt b/requirements.txt
index f02265101cf79ee60c38972408a2c47c66d3aca5..0250d12d71d2dc942a81e2c44581e6f250188a67 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 backports.tempfile==1.0
-Flask==1.0.3
+Flask==1.1.1
 gevent==1.4.0
 gunicorn==19.9.0
 futures