diff --git a/README.md b/README.md
index dba103e740..8c53675234 100644
--- a/README.md
+++ b/README.md
@@ -53,7 +53,7 @@ Lighthouse maintains two permanent branches:
 - [`stable`][stable]: Always points to the latest stable release.
   - This is ideal for most users.
 - [`unstable`][unstable]: Used for development, contains the latest PRs.
-  - Developers should base thier PRs on this branch.
+  - Developers should base their PRs on this branch.
 
 ## Contributing