diff --git a/README.md b/README.md
index f3afe183..ca6fba76 100644
--- a/README.md
+++ b/README.md
@@ -246,7 +246,7 @@ e.g. Ubuntu, Debian or Linux Mint, you might install build dependencies like thi
 
 ```bash
 # Debian / Ubuntu
-sudo apt-get install --no-install-recommends gettext build-essential autoconf libtool libpcre3-dev asciidoc xmlto libev-dev libudns-dev automake libmbedtls-dev
+sudo apt-get install --no-install-recommends gettext build-essential autoconf libtool libpcre3-dev asciidoc xmlto libev-dev libudns-dev automake libmbedtls-dev libsodium-dev
 # CentOS / Fedora / RHEL
 sudo yum install gettext gcc autoconf libtool automake make asciidoc xmlto udns-devel libev-devel
 # Arch