diff --git a/src/background/spider.js b/src/background/spider.js
index 410be8a..a3d9682 100644
--- a/src/background/spider.js
+++ b/src/background/spider.js
@@ -151,6 +151,9 @@ function handleListenerDisconnect() {
 		let data = '';
 		for(const val in values)
 		{
+			if(values[val] === null)
+				continue;
+			
 			names += '`' + val + '`,';
 			data += mysqlSingle.escape(values[val]) + ',';
 		}