diff --git a/dist/frappe-datatable.cjs.js b/dist/frappe-datatable.cjs.js
index d76056b..8e71586 100644
--- a/dist/frappe-datatable.cjs.js
+++ b/dist/frappe-datatable.cjs.js
@@ -1254,7 +1254,7 @@ class DataManager {
         const cells = this.rows.map(row => row[colIndex]);
 
         cells.forEach(cell => {
-            const hay = (cell.content || '').toLowerCase();
+            const hay = String(cell.content || '').toLowerCase();
             const needle = (keyword || '').toLowerCase();
 
             if (!needle || hay.includes(needle)) {
diff --git a/dist/frappe-datatable.js b/dist/frappe-datatable.js
index 89493d4..67400bf 100644
--- a/dist/frappe-datatable.js
+++ b/dist/frappe-datatable.js
@@ -1253,7 +1253,7 @@ class DataManager {
         const cells = this.rows.map(row => row[colIndex]);
 
         cells.forEach(cell => {
-            const hay = (cell.content || '').toLowerCase();
+            const hay = String(cell.content || '').toLowerCase();
             const needle = (keyword || '').toLowerCase();
 
             if (!needle || hay.includes(needle)) {
diff --git a/docs/frappe-datatable.js b/docs/frappe-datatable.js
index 89493d4..67400bf 100644
--- a/docs/frappe-datatable.js
+++ b/docs/frappe-datatable.js
@@ -1253,7 +1253,7 @@ class DataManager {
         const cells = this.rows.map(row => row[colIndex]);
 
         cells.forEach(cell => {
-            const hay = (cell.content || '').toLowerCase();
+            const hay = String(cell.content || '').toLowerCase();
             const needle = (keyword || '').toLowerCase();
 
             if (!needle || hay.includes(needle)) {