diff --git a/README.md b/README.md
index 4eaa751e..eccb4849 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,7 @@ probably differ), install the following additional packages:
 * pkg-config
 * xorg-dev
 * libgtk-3-dev
+* python3-mypy
 
 ## Build