2 files changed, 6 insertions, 0 deletions
diff --git a/CHANGES.rst b/CHANGES.rst
index 412a23b..37882ab 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,3 +1,8 @@
+4.1
+===
+
+* #40: Declare dependency on Setuptools in package metadata.
+
 4.0
 ===
 
diff --git a/setup.py b/setup.py
index 9320edb..f3cfe54 100644
--- a/setup.py
+++ b/setup.py
@@ -32,6 +32,7 @@ params = dict(
 	py_modules=['ptr'],
 	python_requires='>=2.7,!=3.0,!=3.1',
 	install_requires=[
+		'setuptools>=27.3',
 	],
 	extras_require={
 		'testing': [