diff --git a/setup.py b/setup.py
index c31146b..fa06f8f 100644
--- a/setup.py
+++ b/setup.py
@@ -136,7 +136,7 @@ def build_extension(self, ext: CMakeExtension) -> None:
     cmdclass={"build_ext": CMakeBuild},
     zip_safe=False,
     extras_require={"test": ["pytest>=6.0"],
-                    "pydrake": ["pydrake>=1.20"]
+                    "pydrake": ["pydrake>=1.20"],
                     "numpy": ["numpy>=1.21.0"]},
     python_requires=">=3.10",
 )