diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index bf8b954..625ab54 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -12,7 +12,7 @@ By participating, you agree to abide by our [Code of Conduct](CODE_OF_CONDUCT.md
 ## Development Setup
 
 ### Prerequisites
-- Python ≥ 3.9
+- Python 3.10 - 3.12
 - CMake ≥ 3.26, < 4.0 (`cmake --version`)
 - A C++17-compatible compiler (e.g., `g++-11+`, `clang++`, Apple Clang on macOS)
 
diff --git a/README.md b/README.md
index cd9f686..e3fa535 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-<div align=" center">
+<div align="center">
   <picture>
     <source media="(prefers-color-scheme: dark)" srcset="https://zvec.oss-cn-hongkong.aliyuncs.com/logo/github_log_2.svg" />
     <img src="https://zvec.oss-cn-hongkong.aliyuncs.com/logo/github_logo_1.svg" width="400" alt="zvec logo" />