diff --git a/tools/onboarding-server/requirements.txt b/tools/onboarding-server/requirements.txt
index bcea9ac..4baba5c 100644
--- a/tools/onboarding-server/requirements.txt
+++ b/tools/onboarding-server/requirements.txt
@@ -1,7 +1,7 @@
 click==6.7
 structlog==18.2.0
 eth-utils==1.2.1
-Flask==1.0.2
+Flask==2.3.2
 gunicorn==19.9.0
 raiden>=0.15.0
 redis==2.10.6