diff --git a/.gitignore b/.gitignore
index 8ee672d..f74ed1d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -20,4 +20,9 @@ build_db.py
 *.opt.json
 
 # todo
-TODO.md
\ No newline at end of file
+TODO.md
+
+# build pyd
+build
+*.c
+*.pyd
\ No newline at end of file
diff --git a/build_pyd.py b/build_pyd.py
new file mode 100644
index 0000000..03e01de
--- /dev/null
+++ b/build_pyd.py
@@ -0,0 +1,4 @@
+from distutils.core import setup
+from Cython.Build import cythonize
+
+setup(ext_modules=cythonize("tjnetwork.py"))
\ No newline at end of file
diff --git a/install.py b/install.py
index fca9f0d..f657d33 100644
--- a/install.py
+++ b/install.py
@@ -18,7 +18,8 @@ def install():
     packages = [
         '"psycopg[binary]"',
         'pytest',
-        'numpy']
+        'numpy',
+        'Cython']
 
     if minor == 4:
         packages.append('script/package/PyMetis-2018.1-cp34-cp34m-win_amd64.whl')