diff --git a/setup.py b/setup.py
index a74ddc4..55f35fc 100755
--- a/setup.py
+++ b/setup.py
@@ -21,6 +21,8 @@
       ],
       install_requires=[
                 'numpy',
+                'numexpr',
+                'Cython',
                 'datreant>=0.6.0-dev',
                 'pandas>=0.16.1',
                 'tables>=3.2.0',