diff --git a/README.md b/README.md
index eb1f49b..86d334e 100644
--- a/README.md
+++ b/README.md
@@ -50,6 +50,7 @@ Clone this repository using Git and use [CMake](https://cmake.org) to build Rank
 ```sh
 git clone https://github.com/Marukyu/RankCheck.git
 cd RankCheck
+git pull --recurse-submodules
 mkdir build
 cd build
 cmake ..