diff --git a/README.md b/README.md
index c27de9e..e837e0e 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,7 @@ My code for CodeCrafter's ["Build Your Own Docker" Challenge](https://codecrafte
 
 ## Requirements
 - docker
+- tar
 
 ## Getting started
 ```sh