diff --git a/scripts/install b/scripts/install
index ed3ea90..e2ce56b 100644
--- a/scripts/install
+++ b/scripts/install
@@ -71,7 +71,7 @@ ynh_app_setting_set "$app" port "$port"
 #=================================================
 
 # add backports (required to install ffmpeg)
-echo "deb http://httpredir.debian.org/debian jessie-backports main" | tee /etc/apt/sources.list.d/jessie-backports.list
+echo "deb http://httpredir.debian.org/debian stretch-backports main" | tee /etc/apt/sources.list.d/stretch-backports.list
 ynh_package_update
 
 ynh_install_app_dependencies build-essential curl ffmpeg \
diff --git a/scripts/upgrade b/scripts/upgrade
index fa60bb3..14e0117 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -35,6 +35,12 @@ if [ -z "$redis_db" ]; then
 	ynh_app_setting_set "$app" redis_db "$redis_db"
 fi
 
+# Make sure we use stretch backports and not jessie's
+if [ ! -f /etc/apt/sources.list.d/stretch-backports.list ]; then
+	echo "deb http://httpredir.debian.org/debian stretch-backports main" | tee /etc/apt/sources.list.d/stretch-backports.list
+	ynh_secure_remove /etc/apt/sources.list.d/jessie-backports.list
+fi
+
 #=================================================
 # BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
 #=================================================