diff --git a/pyproject.toml b/pyproject.toml
index 89e35d72..3587a7ef 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -13,7 +13,7 @@ dependencies = [
     "flask-json==0.4.0",
     "flask-migrate==4.0.7",
     "flask-sqlalchemy==3.1.1",
-    "flask==3.0.3",
+    "flask==3.1.0",
     "funding-service-design-utils>=5.0.8,<6.0.0",
     "marshmallow-sqlalchemy==1.0.0",
     "openapi-spec-validator>=0.7.1",