Update README.md (#13)

Author: guykorlandredis

README.md

@@ -4,6 +4,7 @@
 [![CircleCI](https://circleci.com/gh/RedisBloom/redisbloom-py/tree/master.svg?style=svg)](https://circleci.com/gh/RedisBloom/redisbloom-py/tree/master)
 [![GitHub issues](https://img.shields.io/github/release/RedisBloom/redisbloom-py.svg)](https://github.com/RedisBloom/redisbloom-py/releases/latest)
 [![Codecov](https://codecov.io/gh/RedisBloom/redisbloom-py/branch/master/graph/badge.svg)](https://codecov.io/gh/RedisBloom/redisbloom-py)
+[![Known Vulnerabilities](https://snyk.io/test/github/RedisBloom/redisbloom-py/badge.svg?targetFile=requirements.txt)](https://snyk.io/test/github/RedisBloom/redisbloom-py?targetFile=requirements.txt)
 
 redisbloom-py is a package that gives developers easy access to several probabilistic data structures. The package extends [redis-py](https://github.com/andymccurdy/redis-py)'s interface with RedisBloom's API.