diff --git a/setup.py b/setup.py
index 0e8d19a22..59f6dbd9e 100644
--- a/setup.py
+++ b/setup.py
@@ -43,6 +43,7 @@ install_requires = [
     'ConfigArgParse>=0.9.3',
     'configobj',
     'cryptography>=0.7',  # load_pem_x509_certificate
+    'fasteners',
     'mock',
     'parsedatetime>=1.3',  # Calendar.parseDT
     'PyOpenSSL',