diff --git a/index.js b/index.js
index ae80bb7..a89ee1b 100644
--- a/index.js
+++ b/index.js
@@ -484,7 +484,17 @@ app.get("/api/v1/admin/callLogs", (req, res) => {
 				rows = rows.map(row => {
 					const newRow = {};
 					for (const key in row) {
-						newRow[key] = String(row[key]);
+						// Convert BigInt explicitly to avoid "Cannot mix BigInt and other types" errors,
+						// handle Dates and null/undefined safely, otherwise coerce to string.
+						if (typeof row[key] === 'bigint') {
+							newRow[key] = row[key].toString();
+						} else if (row[key] instanceof Date) {
+							newRow[key] = row[key].toISOString();
+						} else if (row[key] === null || row[key] === undefined) {
+							newRow[key] = null;
+						} else {
+							newRow[key] = String(row[key]);
+						}
 					}
 					return newRow;
 				});