diff --git a/docs/source/conf.py b/docs/source/conf.py
index 57cfbc931..6cec78d69 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -1,4 +1,4 @@
-from mani_skill2 import __version__
+__version__ = "3.0.0.dev0"
 # Configuration file for the Sphinx documentation builder.
 #
 # For the full list of built-in configuration values, see the documentation:
diff --git a/setup.py b/setup.py
index 7e2b60a7b..1198b948e 100644
--- a/setup.py
+++ b/setup.py
@@ -18,7 +18,7 @@
         include=["mani_skill2*", "warp_maniskill*"],
         exclude=["warp_maniskill.warp.tests"],
     ),
-    python_requires=">=3.8",
+    python_requires=">=3.9",
     setup_requires=["setuptools>=62.3.0"],
     install_requires=[
         "numpy>=1.22",