diff --git a/pyproject.toml b/pyproject.toml
index ed9dffe..155dfec 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,7 +23,7 @@ classifiers = [
 ]
 requires-python = ">=3.9"
 dependencies = [
-    "connexion[swagger-ui] >= 2.0.2, < 3",
+    "connexion[swagger-ui] >= 2.0.2, < 4",
     "ruamel.yaml >= 0.15.78",
     "schema-salad",
 ]