diff --git a/setup.py b/setup.py
index 6f6d76e68..6d2eccb4e 100644
--- a/setup.py
+++ b/setup.py
@@ -29,16 +29,24 @@ if platform.python_implementation() == 'PyPy':
     sysconfig.customize_compiler = my_customize_compiler
 
 
-def install_headers():
-    dest_dir = path.join(sys.prefix, 'include', 'murmurhash')
-    if not path.exists(dest_dir):
-        shutil.copytree('murmurhash/headers/murmurhash', dest_dir)
+#def install_headers():
+#    dest_dir = path.join(sys.prefix, 'include', 'murmurhash')
+#    if not path.exists(dest_dir):
+#        shutil.copytree('murmurhash/headers/murmurhash', dest_dir)
+#
+#    dest_dir = path.join(sys.prefix, 'include', 'numpy')
 
 
-install_headers()
 includes = ['.', path.join(sys.prefix, 'include')]
 
 
+try:
+    import numpy
+    includes.append(numpy.get_include())
+except ImportError:
+    pass
+
+
 def clean(ext):
     for src in ext.sources:
         if src.endswith('.c') or src.endswith('cpp'):
@@ -87,7 +95,7 @@ def run_setup(exts):
                       "spacy.syntax": ["*.pxd"]},
         ext_modules=exts,
         license="Dual: Commercial or AGPL",
-        install_requires=['murmurhash', 'cymem', 'preshed', 'thinc',
+        install_requires=['numpy', 'murmurhash', 'cymem', 'preshed', 'thinc',
                           "unidecode", ],
         setup_requires=["headers_workaround"],
     )