diff --git a/tools/upgrade.sh b/tools/upgrade.sh
index 7a7d9b462f..551ca1a888 100755
--- a/tools/upgrade.sh
+++ b/tools/upgrade.sh
@@ -19,6 +19,7 @@ source "$SCRIPT_DIR/utils.sh"
 
 cd "$SCODOC_DIR" || { echo "Invalid directory"; exit 1; }
 
+export DEBIAN_FRONTEND=noninteractive
 
 check_uid_root "$0"