diff --git a/README.md b/README.md
index 9e55024..870f64c 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,14 @@ Captcha for Python, which generates captcha image by Rust.
 - Simple, Easy to use;
 - High performance.
 
+## Install
+
+Install captchax with pip:
+
+```bash
+pip install captchax
+```
+
 ## Usage
 
 ```python
diff --git a/pyproject.toml b/pyproject.toml
index 260413c..17f0649 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,6 +9,7 @@ classifiers = [
     "Programming Language :: Rust",
     "Programming Language :: Python :: Implementation :: CPython",
     "Programming Language :: Python :: Implementation :: PyPy",
+    "Topic :: Security",
 ]
 dynamic = ["version"]
 [tool.maturin]