diff --git a/README.md b/README.md
index a071a35..fd9f545 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,8 @@ https://crafatar.com
 Crafatar serves Minecraft skins and heads for use in external applications.
 Inspired by [Gravatar](https://gravatar.com) (hence the name) and [Minotar](https://minotar.net).
 
+Image manipulation is done by [lwip](https://github.com/EyalAr/lwip)
+
 ## Usage
 
 See the [API Usage](https://crafatar.com)