diff --git a/tox.ini b/tox.ini
index e9402e8..784aa17 100644
--- a/tox.ini
+++ b/tox.ini
@@ -5,7 +5,7 @@ envlist =
     # When modifying the list of CPython and PyPy versions to test here,
     # be sure to update the "depends" configurations elsewhere in this file.
     # This ensures that coverage is reported only after all tests have run.
-    py{39, 310, 311, 312}
+    py{39, 310, 311, 312, 313}
     pypy{39, 310}
     coverage_report