diff --git a/airflow/www/static/js/trigger.js b/airflow/www/static/js/trigger.js
index 9242984e75bdf..012930afa89ca 100644
--- a/airflow/www/static/js/trigger.js
+++ b/airflow/www/static/js/trigger.js
@@ -170,6 +170,7 @@ function initForm() {
           $(elementId).select2({
             placeholder: "Select Values",
             allowClear: true,
+            width: "100%",
           });
           elements[i].addEventListener("blur", updateJSONconf);
         } else if (elements[i].type === "checkbox") {