diff --git a/.python-version b/.python-version
index 9ad6380c..8e34c813 100644
--- a/.python-version
+++ b/.python-version
@@ -1 +1 @@
-3.8.18
+3.9.19
diff --git a/pyproject.toml b/pyproject.toml
index d0c4e3a1..43f85816 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,13 +8,12 @@ license = { file = "LICENSE" }
 classifiers = [
     "License :: OSI Approved :: Apache Software License",
     "Programming Language :: Python :: 3 :: Only",
-    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
 ]
-requires-python = ">= 3.8"
+requires-python = ">= 3.9"
 
 [project.urls]
 Source = "https://github.com/shiguredo/sora-python-sdk"
diff --git a/run.py b/run.py
index 3c8cbcc3..2c4c2ab7 100644
--- a/run.py
+++ b/run.py
@@ -273,7 +273,7 @@ def main():
                 "-DCMAKE_FIND_ROOT_PATH_MODE_PACKAGE=BOTH",
                 f"-DCMAKE_SYSROOT={sysroot}",
                 f"-DLIBCXX_INCLUDE_DIR={cmake_path(os.path.join(webrtc_info.libcxx_dir, 'include'))}",
-                f"-DPython_ROOT_DIR={cmake_path(os.path.join(sysroot, 'usr', 'include', 'python3.8'))}",
+                f"-DPython_ROOT_DIR={cmake_path(os.path.join(sysroot, 'usr', 'include', 'python3.9'))}",
                 "-DNB_SUFFIX=.cpython-38-aarch64-linux-gnu.so",
             ]