diff --git a/Readme.md b/Readme.md
index 1f6ab2a..edf4112 100644
--- a/Readme.md
+++ b/Readme.md
@@ -15,6 +15,8 @@ This is a demo of jtag simulation by openocd running on verilator.
 ## install openocd
 
 ```shell
+sudo apt-get install libjim-dev
+sudo apt-get install libjaylink-dev
 git clone https://github.com/riscv/riscv-openocd.git
 cd riscv-openocd
 ./bootstrap