diff --git a/.gitignore b/.gitignore
index d16c110..39070f9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,6 @@ douzero_checkpoints/
 venv/
 .idea/
 *.egg-info/
+*.c
+*.pyd
+build/
diff --git a/setup.py b/setup.py
index 554c30c..e0a5fa1 100644
--- a/setup.py
+++ b/setup.py
@@ -1,4 +1,5 @@
 import setuptools
+from Cython.Build import cythonize
 
 VERSION = '1.1.0'
 
@@ -21,6 +22,11 @@ setuptools.setup(
         'torch',
         'rlcard'
     ],
+    ext_modules = cythonize(
+        ["douzero/dmc/*.py", "douzero/env/*.py", "douzero/evaluation/*.py", "douzero/radam/*.py"], 
+        exclude="**/__init__.py",
+        language_level=3
+    ),
     requires_python='>=3.6',
     classifiers=[
         "Programming Language :: Python :: 3.9",