diff --git a/packages/@jsii/python-runtime/setup.py b/packages/@jsii/python-runtime/setup.py
index 55f021b2e4..7d94da77b9 100644
--- a/packages/@jsii/python-runtime/setup.py
+++ b/packages/@jsii/python-runtime/setup.py
@@ -30,7 +30,7 @@
         "jsii._embedded.jsii": ["*.js", "*.js.map"],
     },
     install_requires=[
-        "attrs>=21.2,<24.0",
+        "attrs>=21.2,<25.0",
         "cattrs>=1.8,<23.3",
         "importlib_resources>=5.2.0",
         "publication>=0.0.3",  # This is used by all generated code.