diff --git a/dev-requirements.txt b/dev-requirements.txt
index d5ea78f8..84e7b684 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -11,7 +11,7 @@ opentelemetry-instrumentation-grpc
 httpx>=0.28.1
 pyOpenSSL>=26.0.0
 # needed for type checking
-Flask>=1.1
+Flask>=3.1.3
 # needed for auto fix
 ruff===0.14.1
 # needed for .env file loading in examples