1 files changed, 1 insertions, 1 deletions
diff --git a/setup.py b/setup.py
index 9dd2566..586d3e5 100644
--- a/setup.py
+++ b/setup.py
@@ -115,7 +115,7 @@ arguments = dict(
         "Topic :: Utilities",
     ],
     python_requires=">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*",
-    extras_require=dict(toml=["toml"]),
+    extras_require=dict(toml=["toml", "setuptools>=42"]),
 )
 
 if __name__ == "__main__":