diff --git a/scripts/install b/scripts/install
index c82fb85..9548a40 100755
--- a/scripts/install
+++ b/scripts/install
@@ -18,6 +18,8 @@ ynh_script_progression --message="Setting up source files..." --weight=1
 
 ynh_setup_source --dest_dir="$install_dir"
 
+ynh_replace_string --match_string="define('ENVIRONMENT', 'development');" --replace_string="define('ENVIRONMENT', 'production');" --target_file=$install_dir/index.php
+
 chown -R $app:www-data "$install_dir"
 
 #=================================================
@@ -34,7 +36,7 @@ ynh_use_logrotate
 ynh_add_config --template="cron" --destination="/etc/cron.d/$app"
 chown root: "/etc/cron.d/$app"
 chmod 644 "/etc/cron.d/$app"
-
+   
 #=================================================
 # END OF SCRIPT
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index 876a157..c4ed1ce 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -18,6 +18,8 @@ ynh_script_progression --message="Upgrading source files..." --weight=1
 
 ynh_setup_source --dest_dir="$install_dir"
 
+ynh_replace_string --match_string="define('ENVIRONMENT', 'development');" --replace_string="define('ENVIRONMENT', 'production');" --target_file=$install_dir/index.php
+
 chown -R $app:www-data "$install_dir"
 
 #=================================================