diff --git a/README.md b/README.md
index bae17c9..eeab6ac 100755
--- a/README.md
+++ b/README.md
@@ -1,9 +1,8 @@
 noiseprotocol
 =============
-[![Build Status](https://travis-ci.org/plizonczyk/noiseprotocol.svg?branch=master)](https://travis-ci.org/plizonczyk/noiseprotocol)
+[![CircleCI](https://circleci.com/gh/plizonczyk/noiseprotocol.svg?style=svg)](https://circleci.com/gh/plizonczyk/noiseprotocol)
 [![PyPI](https://img.shields.io/pypi/v/noiseprotocol.svg)](https://pypi.python.org/pypi/noiseprotocol)
 [![Documentation Status](https://readthedocs.org/projects/noiseprotocol/badge/)](http://noiseprotocol.readthedocs.io/)
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 This repository contains source code of **noiseprotocol** - a Python 3 implementation of [Noise Protocol Framework](http://www.noiseprotocol.org/).
 Compatible with revisions 32 and 33.
@@ -15,14 +14,14 @@ Available on [Read the Docs](https://noiseprotocol.readthedocs.io). For now it p
 HandshakeState, CipherState and SymmetricState. Refer to the rest of the README below for more information.
 
 ## Installation and prerequisites
-For now, only Python 3.5+ is supported.
-The author provides support for Linux systems only. Although the CI systems perform testing on **Windows and OS X**, consider their support even **more experimental** than the whole package, though OS X usage should not differ from Linux.
+Only Python 3.5+ is supported.
+The author provides support for Linux systems only. Theoretically, package should work under Windows and OS X too, but those systems are not included in CI workflow.
 
 Install via pip:
 ```
 pip install noiseprotocol 
 ```
-*noiseprotocol* depends on [Cryptography](https://github.com/pyca/cryptography/) package (and its' pre-packaged OpenSSL v1.1) as a source of crypto-primitives. 
+*noiseprotocol* depends on [Cryptography](https://github.com/pyca/cryptography/) package (and its' pre-packaged OpenSSL v1.1) as a source of crypto-primitives. Usage of non-default crypto backend is possible as of version 0.3.0. 
  
 ## Usage