diff --git a/chrome/content/zotero/import/mendeley/mendeleyImport.js b/chrome/content/zotero/import/mendeley/mendeleyImport.js
index bf9d5e6f17..3361829881 100644
--- a/chrome/content/zotero/import/mendeley/mendeleyImport.js
+++ b/chrome/content/zotero/import/mendeley/mendeleyImport.js
@@ -1187,6 +1187,11 @@ Zotero_Import_Mendeley.prototype._saveAnnotations = async function (annotations,
 				annotations = await Zotero.PDFWorker.processMendeleyAnnotations(file, annotations);
 				
 				for (let annotation of annotations) {
+					// Ignore empty highlights
+					if (annotation.type == 'highlight' && !annotation.text) {
+						continue;
+					}
+					
 					let o = annotationMap.get(annotation.id);
 					Object.assign(o, annotation);
 					
diff --git a/pdf-worker b/pdf-worker
index 7392a40d50..7f66c552c6 160000
--- a/pdf-worker
+++ b/pdf-worker
@@ -1 +1 @@
-Subproject commit 7392a40d50221da8b99bb72f43cd9e22c3297eac
+Subproject commit 7f66c552c65bdf0b8499ccbd011d8dbf2cf2e4b1