diff --git a/paropt-service/requirements.txt b/paropt-service/requirements.txt
index e32fe6d..9dcf6c9 100644
--- a/paropt-service/requirements.txt
+++ b/paropt-service/requirements.txt
@@ -1,4 +1,4 @@
-flask==1.0.2
+flask==2.3.2
 globus-sdk
 psycopg2-binary==2.8.1
 pyopenssl