diff --git a/setup.py b/setup.py
index 290ba3924..4f192b886 100755
--- a/setup.py
+++ b/setup.py
@@ -5,7 +5,6 @@ from setuptools import setup
 install_requires = [
     'argparse',
     'jsonschema',
-    'M2Crypto',
     'mock',
     'pycrypto',
     'python-augeas',
@@ -13,6 +12,9 @@ install_requires = [
     'requests',
     'zope.component',
     'zope.interface',
+    # order of items in install_requires DOES matter and M2Crypto has
+    # to go last, see #152
+    'M2Crypto',
 ]
 
 docs_extras = [