diff --git a/routing-c4c/requirements.txt b/routing-c4c/requirements.txt
index 33bc384..b845f28 100644
--- a/routing-c4c/requirements.txt
+++ b/routing-c4c/requirements.txt
@@ -1,3 +1,3 @@
-Flask==1.0
+Flask==2.3.2
 cloudant==2.4.0
 python-dotenv