License project under GNU GPLv3

README.md

@@ -4,7 +4,7 @@ A shooting game where can pick and meld fire guns!
 
 ![Hyper Gunners logo](icon.png)
 
-# Build
+## Build
 
 You need `make` and `SDL1` to build this project.
 
@@ -18,3 +18,8 @@ To execute :
 ```sh
 $ make exec
 ```
+
+## License
+
+GNU GPLv3, see `LICENSE.txt`.
+