diff --git a/README.md b/README.md
index 250dc17..2c78b2f 100644
--- a/README.md
+++ b/README.md
@@ -19,6 +19,7 @@ This project is a rewrite of [litecord-reference].
 Requirements:
 - Python 3.7 or higher
 - PostgreSQL
+- gifsicle for GIF emoji and avatar handling.
 - [Pipenv]
 
 [pipenv]: https://github.com/pypa/pipenv