diff --git a/README.md b/README.md
index ee59fba..19c6a32 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,8 @@ All (or at least most) of my plugins will require you to install Annoying API. F
 - **Stable:** You can download the latest *(stable)* version at [Modrinth](https://modrinth.com/plugin/annoying-api), [Spigot](https://spigotmc.org/resources/106637), [Bukkit](https://dev.bukkit.org/projects/annoying-api), or [releases/latest](https://github.com/srnyx/annoying-api/releases/latest)
 - **Snapshot:** You can download the latest *(snapshot)* version at [actions/workflows/build.yml](https://github.com/srnyx/annoying-api/actions/workflows/build.yml)
 
+AnnoyingAPI also requires another API/library (I know, annoying [pun intended]) called Interface4. AnnoyingAPI will automatically install Interface4, however, you can also install it manually at [spigotmc.org/resources/102119](https://spigotmc.org/resources/102119).
+
 ## Developers
 
 You can find the Javadocs at [jitpack.io/com/github/srnyx/annoying-api/latest/javadoc/](https://jitpack.io/com/github/srnyx/annoying-api/latest/javadoc/)