diff --git a/README.md b/README.md
index ba78d0e..d8f646a 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,7 @@ a small game made entirely on live stream over about 15 hours.
 ### building
   - You need C++17 and CMake
   - Make sure you have SDL2 headers & libraries, and make sure CMake can find them
+  - All the art was made in [Aseprite](https://www.aseprite.org/). To modify or add new sprites, you'll need to use aseprite.
 
 ![Screenshot](https://github.com/noelfb/tiny_link/raw/main/screenshot.png "Screenshot")