diff --git a/setup.py b/setup.py
index 4f3d969cc..a26a25fde 100644
--- a/setup.py
+++ b/setup.py
@@ -92,5 +92,5 @@ setup(
             "Topic :: Internet :: Proxy Servers",
             "Topic :: Software Development :: Testing"
         ],
-        install_requires=['urwid', 'pyasn1', 'pyopenssl'],
+        install_requires=['urwid', 'pyasn1', 'pyopenssl', "PIL"],
 )