diff --git a/docs/internals.md b/docs/internals.md
index bf275ad..24598ba 100644
--- a/docs/internals.md
+++ b/docs/internals.md
@@ -30,7 +30,7 @@ For running the Docker containers you can use the following command:
 docker compose up -d
 ```
 
-## Unit testing	
+## Unit testing
 
 The package is tested with [PHPUnit](https://phpunit.de/).