diff --git a/README.md b/README.md
index d50c1b3bc0fd8db8e56d063f9c0cd85186d881ae..2bfe8049fdc62b650aef2792b349479c8fe32f7a 100644
--- a/README.md
+++ b/README.md
@@ -78,7 +78,7 @@ A **Vagrant** configuration is included for development purposes.
 
 ## Contributing
 
-Mastodon is **free, open source software** licensed under **AGPLv3**.
+Mastodon is **free, open-source software** licensed under **AGPLv3**.
 
 You can open issues for bugs you've found or features you think are missing. You can also submit pull requests to this repository, or submit translations using Weblate. To get started, take a look at [CONTRIBUTING.md](CONTRIBUTING.md). If your contributions are accepted into Mastodon, you can request to be paid through [our OpenCollective](https://opencollective.com/mastodon).