diff --git a/README.md b/README.md
index 4449811..2ffc1a4 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,15 @@ Python script to quickly delete old messages on a Misskey instance.
 
 ## Usage
 
+Before using, you'll need to install the [Misskey.py](https://pypi.org/project/Misskey.py/)
+pip module:
+
+```
+# pip3 install Misskey.py
+```
+
 From the built-in help:
+
 ```
 usage: missclear.py [-h] [-d DAYS] [-q] [-r RETRIES] [-A | -N] instance