diff --git a/lib/World b/lib/World
index 13d96fc..f8dd5fb 160000
--- a/lib/World
+++ b/lib/World
@@ -1 +1 @@
-Subproject commit 13d96fc7da25da5fb808844d88337317e9fa0d76
+Subproject commit f8dd5fb289db6a7f7f704497752bf32b258f9151
diff --git a/setup.py b/setup.py
index d2a8d67..0bc10c8 100644
--- a/setup.py
+++ b/setup.py
@@ -11,7 +11,7 @@
 from setuptools.command.build_ext import build_ext
 
 
-_VERSION = '0.3.4'
+_VERSION = '0.3.5'
 
 
 world_src_top = join("lib", "World", "src")
@@ -39,11 +39,11 @@
     ],
     install_requires=[
         'numpy',
-        'cython>=0.24',
+        'cython>=3.0.2',
     ],
     extras_require={
         'test': ['nose'],
-        'sdist': ['numpy', 'cython>=0.24'],
+        'sdist': ['numpy', 'cython>=3.0.2'],
     },
     author="Pyworld Contributors",
     author_email="jeremycchsu@gmail.com",