diff --git a/docs/INSTALL.md b/docs/INSTALL.md
index 78d9e60..25204f3 100644
--- a/docs/INSTALL.md
+++ b/docs/INSTALL.md
@@ -20,7 +20,7 @@ automake pkg-config libtool libffi-dev libssl-dev
 
 Then:
 
-    sudo pip install virtualenv service-identity
+    sudo pip install virtualenv
     mkdir jmvenv
     virtualenv jmvenv
     cd jmvenv; source bin/activate; cd ..
diff --git a/jmbase/setup.py b/jmbase/setup.py
index 20517da..181859c 100644
--- a/jmbase/setup.py
+++ b/jmbase/setup.py
@@ -9,5 +9,5 @@ setup(name='joinmarketbase',
       author_email='ekaggata@gmail.com',
       license='GPL',
       packages=['jmbase'],
-      install_requires=['twisted==16.6.0',],
+      install_requires=['twisted==16.6.0', 'service-identity'],
       zip_safe=False)