diff --git a/pyproject.toml b/pyproject.toml
index 86fecce5..a305b631 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -40,7 +40,7 @@ online = [
     "flask-cors>=3.0,<3.1",
     "panoptes-client>=1.6,<1.7",
     "requests>=2.28,<2.32",
-    "gunicorn>=20.0,<20.2",
+    "gunicorn>=20.0,<21.3",
     "sentry-sdk[flask]>=1.0,<1.30",
     "newrelic>=8.4.0,<9.1.2",
     "gitpython>=3.0.0,<3.2"