diff --git a/pyproject.toml b/pyproject.toml
index 111c566a7..b90523359 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -37,7 +37,7 @@ dependencies = [
     "Brotli>=1.0,<=1.1.0",
     "certifi>=2019.9.11",  # no upper bound here to get latest CA bundle
     "cryptography>=42.0,<43.1",  # relaxed upper bound here to get security fixes
-    "flask>=3.0,<=3.0.3",
+    "flask>=3.0,<=3.1.0",
     "h11>=0.11,<=0.14.0",
     "h2>=4.1,<=4.1.0",
     "hyperframe>=6.0,<=6.0.1",