diff --git a/install.sh b/install.sh
index 87d53bf09..fad8b4c09 100755
--- a/install.sh
+++ b/install.sh
@@ -1,7 +1,7 @@
 #! /usr/bin/env bash
 
 echo " > Installing PHP dependencies through Composer..."
-composer install --no-interaction --no-progress --prefer-dist -o --no-dev
+SYMFONY_ENV=prod composer install --no-interaction --no-progress --prefer-dist -o --no-dev
 
 chmod ugo+x vendor/mouf/nodejs-installer/bin/local/npm
 echo " > Downloading librairies through npm..."