diff --git a/index.js b/index.js
index 0f14fdf..dfa8fc1 100644
--- a/index.js
+++ b/index.js
@@ -47,8 +47,8 @@ async function getAndPostPullRequests() {
       head: branch,
       base: base_branch,
       assignee: assignee || undefined, // Changed to be omitted if empty
-      assignees: assigneesInput ? assigneesInput.split(",") : undefined, // Changed to be omitted if empty
-      labels: labelsInput ? labelsInput.split(",").map(Number) : undefined, // Changed to be omitted if empty
+      assignees: assigneesInput ? assigneesInput.split(",") : [], // Changed to be omitted if empty
+      labels: labelsInput ? labelsInput.split(",").map(Number) : [], // Changed to be omitted if empty
       due_date: dueDate || undefined, // Changed to be omitted if empty
       milestone: milestone ? parseInt(milestone, 10) : 0, // Changed to be omitted if empty
     };