diff --git a/dependency_install_steps_by_platform/Ubuntu_18.04.x.md b/dependency_install_steps_by_platform/Ubuntu_18.04.x.md
index 0f3dd86..c3edaa6 100644
--- a/dependency_install_steps_by_platform/Ubuntu_18.04.x.md
+++ b/dependency_install_steps_by_platform/Ubuntu_18.04.x.md
@@ -11,10 +11,10 @@ Description:	Ubuntu 18.04 LTS
 
 
 
-## Install Git, VirtualBox, Ansible, and GnuPG
+## Install Git, VirtualBox, Ansible, GnuPG, and rng-tools
 
 ```
-$ sudo apt install git virtualbox ansible gnupg2
+$ sudo apt install git virtualbox ansible gnupg2 rng-tools
 ```