diff --git a/README.md b/README.md
index 5724e44..6ebf56f 100644
--- a/README.md
+++ b/README.md
@@ -46,7 +46,7 @@ cargo install cargo-xbuild bootimage
 ```
 
 ```bash
-git clone https://github.com/wangrunji0408/RustOS.git
+git clone https://github.com/wangrunji0408/RustOS.git --recursive
 cd RustOS/kernel
 rustup override set nightly
 make run arch=riscv32|x86_64|aarch64
diff --git a/riscv-pk b/riscv-pk
index e125938..98d2ffb 160000
--- a/riscv-pk
+++ b/riscv-pk
@@ -1 +1 @@
-Subproject commit e12593841af47b6b15c7de63804342ef87f271ce
+Subproject commit 98d2ffbb3203e1d9a936b067c51f8522a5ff9677