diff --git a/app.js b/app.js
index 39f8da3..778a8de 100644
--- a/app.js
+++ b/app.js
@@ -91,7 +91,7 @@ function buildCmd() {
         "  exit\n" +
         "fi\n\n" +
         "apt-get update\n" +
-        "apt-get install -y build-essential libpcre3 libpcre3-dev zlib1g zlib1g-dev libssl-dev wget git\n" +
+        "apt-get install -y libbrotli-dev build-essential libpcre3 libpcre3-dev zlib1g zlib1g-dev libssl-dev wget git\n" +
         "wget https://nginx.org/download/nginx-" + extractNginxVersion(nginxStr) + ".tar.gz\n" +
         "tar -xzvf " + "nginx-" + extractNginxVersion(nginxStr) + ".tar.gz\n";
         if (document.getElementById("extMod").checked === true) {