diff --git a/static/script.js b/static/script.js
index 7c18832..cbd7525 100644
--- a/static/script.js
+++ b/static/script.js
@@ -122,6 +122,10 @@ function save(partID) {
 	var data = new FormData();
 
 	if (datasheet.length == 1)
+		if(! datasheet[0]['name'].match(/^[\w\-]+\.pdf$/g)) {
+			alert('Invalid filename. Please match /^[\w\-]+\.pdf$/g');
+			return;
+		}
 		data.append('datasheet-file', datasheet[0]);
 	data.append('block', block_v);
 	data.append('type', type_v);