diff --git a/setup.py b/setup.py
index 9696643..85402d7 100644
--- a/setup.py
+++ b/setup.py
@@ -46,7 +46,8 @@ extras_require = {
 extras_require['all'] = sum((lst for lst in extras_require.values()), [])
 
 install_requires = [
-    'pynacl==1.1.2'
+    'pynacl==1.1.2',
+    'secret-handshake'
 ]
 
 setup_requires = [