diff --git a/src/BUILD_UNIX.md b/src/BUILD_UNIX.md
index 6386d627..eb423f1c 100644
--- a/src/BUILD_UNIX.md
+++ b/src/BUILD_UNIX.md
@@ -33,7 +33,7 @@ You need to install the following software to build SoftEther VPN for UNIX.
 
 ```bash
 sudo yum -y groupinstall "Development Tools"
-sudo yum -y install cmake ncurses-devel openssl-devel libsodium-devel readline-devel zlib-devel
+sudo yum -y install epel-release cmake ncurses-devel openssl-devel libsodium-devel readline-devel zlib-devel
 ```
 
 ## Install requirements on Debian/Ubuntu