--- a/setup.py
+++ b/setup.py
@@ -67,6 +67,7 @@
       license      = 'Epics Open License',
       description  = "Epics Channel Access for Python",
       long_description = long_desc,
+      install_requires = ['numpy', 'wx'],
       platforms    = ['Windows', 'Linux', 'Mac OS X'],
       classifiers  = ['Intended Audience :: Science/Research',
                       'Operating System :: OS Independent',