diff --git a/.github/workflows/release-pypi-kernel.yml b/.github/workflows/release-pypi-kernel.yml
index 1b925b772..c07069c5d 100644
--- a/.github/workflows/release-pypi-kernel.yml
+++ b/.github/workflows/release-pypi-kernel.yml
@@ -5,7 +5,7 @@ on:
     branches:
       - main
     paths:
-      - sgl-kernel/pyproject.toml
+      - sgl-kernel/version.py
   workflow_dispatch:
 
 concurrency:
diff --git a/sgl-kernel/developer_guide.md b/sgl-kernel/developer_guide.md
index 8afb6b0e4..f41ce071e 100644
--- a/sgl-kernel/developer_guide.md
+++ b/sgl-kernel/developer_guide.md
@@ -26,8 +26,8 @@ Steps to add a new kernel:
 
 1. Implement in [src/sgl-kernel/csrc/](https://github.com/sgl-project/sglang/tree/main/sgl-kernel/src/sgl-kernel/csrc)
 2. Expose interface in [csrc/sgl_kernel_ops.cu](https://github.com/sgl-project/sglang/blob/main/sgl-kernel/src/sgl-kernel/csrc/sgl_kernel_ops.cu) with pybind11
-3. Create Python wrapper in [src/sgl-kernel/ops/__init__.py](https://github.com/sgl-project/sglang/blob/main/sgl-kernel/src/sgl-kernel/ops/__init__.py)
-4. Expose Python interface in [src/sgl-kernel/__init__.py](https://github.com/sgl-project/sglang/blob/main/sgl-kernel/src/sgl-kernel/__init__.py)
+3. Create Python wrapper in [src/sgl-kernel/ops/\_\_init\_\_.py](https://github.com/sgl-project/sglang/blob/main/sgl-kernel/src/sgl-kernel/ops/__init__.py)
+4. Expose Python interface in [src/sgl-kernel/\_\_init\_\_.py](https://github.com/sgl-project/sglang/blob/main/sgl-kernel/src/sgl-kernel/__init__.py)
 5. Update [setup.py](https://github.com/sgl-project/sglang/blob/main/sgl-kernel/setup.py) to include new CUDA source
 
 ### Build & Install
@@ -48,4 +48,4 @@ pip3 install dist/*whl --force-reinstall --no-deps
 
 ### Release new version
 
-Update version in [pyproject.toml](https://github.com/sgl-project/sglang/blob/main/sgl-kernel/pyproject.toml)
+Update version in [pyproject.toml](https://github.com/sgl-project/sglang/blob/main/sgl-kernel/pyproject.toml) and [version.py](https://github.com/sgl-project/sglang/blob/main/sgl-kernel/version.py)
diff --git a/sgl-kernel/setup.py b/sgl-kernel/setup.py
index c51fd7045..71952655c 100644
--- a/sgl-kernel/setup.py
+++ b/sgl-kernel/setup.py
@@ -3,17 +3,11 @@ from pathlib import Path
 import torch
 from setuptools import find_packages, setup
 from torch.utils.cpp_extension import BuildExtension, CUDAExtension
+from version import __version__
 
 root = Path(__file__).parent.resolve()
 
 
-def get_version():
-    with open(root / "pyproject.toml") as f:
-        for line in f:
-            if line.startswith("version"):
-                return line.split("=")[1].strip().strip('"')
-
-
 def update_wheel_platform_tag():
     wheel_dir = Path("dist")
     if wheel_dir.exists() and wheel_dir.is_dir():
@@ -122,7 +116,7 @@ ext_modules = [
 
 setup(
     name="sgl-kernel",
-    version=get_version(),
+    version=__version__,
     packages=find_packages(),
     package_dir={"": "src"},
     ext_modules=ext_modules,
diff --git a/sgl-kernel/version.py b/sgl-kernel/version.py
new file mode 100644
index 000000000..4bb48c132
--- /dev/null
+++ b/sgl-kernel/version.py
@@ -0,0 +1 @@
+__version__ = "0.0.2.post15"