README.md in sigh-1.0.0.beta3 vs README.md in sigh-1.0.0.beta5

@@ -49,9 +49,12 @@
 
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 <h5 align="center"><code>sigh</code> is part of <a href="https://fastlane.tools">fastlane</a>: connect all deployment tools into one streamlined workflow.</h5>
 
+### spaceship version
+
+If you're feeling adventurous and want to test the new `sigh` beta with [spaceship](https://spaceship.airforce), update using `sudo gem update sigh --pre`. More information in the [release notes](https://github.com/KrauseFx/sigh/releases/tag/1.0.0.beta5).
 
 # Features
 
 - **Download** the latest provisioning profile for your app
 - **Renew** a provisioning profile, when it has expired