diff --git a/packages/@jsii/python-runtime/setup.py b/packages/@jsii/python-runtime/setup.py
index 8ad77b0b11..a3ef3a3c1f 100644
--- a/packages/@jsii/python-runtime/setup.py
+++ b/packages/@jsii/python-runtime/setup.py
@@ -31,7 +31,7 @@
     },
     install_requires=[
         "attrs>=21.2,<23.0",
-        "cattrs>=1.8,<22.2",
+        "cattrs>=1.8,<22.3",
         "publication>=0.0.3",  # This is used by all generated code.
         "typeguard~=2.13.3",  # This is used by all generated code.
         "python-dateutil",