diff --git a/python/crankshaft/setup.py b/python/crankshaft/setup.py
index b863b27..f045b62 100644
--- a/python/crankshaft/setup.py
+++ b/python/crankshaft/setup.py
@@ -40,7 +40,7 @@ setup(
 
     # The choice of component versions is dictated by what's
     # provisioned in the production servers.
-    install_requires=['pysal==1.11.0','numpy==1.6.1'],
+    install_requires=['pysal==1.11.0','numpy==1.6.1','scipy==0.17.0'],
 
     requires=['pysal', 'numpy'],