Merge pull request #3090 from cak/master

Author: JinyangWang27

README.md

@@ -115,6 +115,7 @@ An opinionated list of Python frameworks, libraries, tools, and resources.
 
 - [Cryptography](#cryptography)
 - [Penetration Testing](#penetration-testing)
+- [Web Security](#web-security)
 
 **Miscellaneous**
 
@@ -1088,6 +1089,12 @@ _Frameworks and tools for penetration testing._
 - [sherlock](https://github.com/sherlock-project/sherlock) - Hunt down social media accounts by username across social networks.
 - [sqlmap](https://github.com/sqlmapproject/sqlmap) - Automatic SQL injection and database takeover tool.
 
+## Web Security
+
+_Libraries for application-layer web security._
+
+- [secure](https://github.com/TypeError/secure) - HTTP security headers for Python web applications with ASGI and WSGI middleware.
+
 **Miscellaneous**
 
 ## Hardware