diff --git a/setup.py b/setup.py
index da272db..2c6ebd4 100644
--- a/setup.py
+++ b/setup.py
@@ -13,9 +13,7 @@ install_requires = [
     'mock',
     'PyOpenSSL',
     'pyparsing>=1.5.5',  # Python3 support; perhaps unnecessary?
-    # For pkg_resources. >=1.0 so pip resolves it to a version cryptography
-    # will tolerate; see #2599:
-    'setuptools>=1.0',
+    'setuptools',
     'zope.interface',
 ]