diff --git a/poetry.lock b/poetry.lock
index aa7c64f..bb68bb5 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -108,5 +108,5 @@ files = [
 
 [metadata]
 lock-version = "2.0"
-python-versions = "^3.8"
-content-hash = "94eb910b7281f9fabe2959c9ea9653f057ac1f0609f2e920e5af8ac3d33ee9fc"
+python-versions = "^3.9"
+content-hash = "b81741ab292eda7348cfc918291e4e676b1b58f982f1c31bf60e31624f41f9d0"
diff --git a/pyproject.toml b/pyproject.toml
index b756d94..6659e96 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,7 +6,7 @@ authors = ["Xusheng <xusheng@vector35.com>"]
 readme = "README.md"
 
 [tool.poetry.dependencies]
-python = "^3.8"
+python = "^3.9"
 pathlib = "^1.0.1"
 pytest = "^8.1.1"