diff --git a/setup.py b/setup.py
index 86873ad53..433721d2a 100644
--- a/setup.py
+++ b/setup.py
@@ -413,7 +413,7 @@ setup(name="tahoe-lafs", # also set in __init__.py
               "pip==22.0.3",
               "wheel==0.37.1",
               "setuptools==60.9.1",
-              "subunitreporter==22.2.0",
+              "subunitreporter==23.8.0",
               "python-subunit==1.4.2",
               "junitxml==0.7",
               "coverage==7.2.5",