diff --git a/README.md b/README.md
index f9018a6..4af4405 100644
--- a/README.md
+++ b/README.md
@@ -49,6 +49,7 @@ Use *Install from URL* option with this repo url.
 - cmake
 
 All requirements will be installed on first use.
+You may need to install [cmake](https://cmake.org/download/) manually.
 
 ### Mask types