diff --git a/lib/workers/repository/extract/file-match.js b/lib/workers/repository/extract/file-match.js
index 34f8a17bafb40ce8e0e5b1950a3f77bb16dca800..26e9edda3b42e26dea95ed88324c578254acc8c4 100644
--- a/lib/workers/repository/extract/file-match.js
+++ b/lib/workers/repository/extract/file-match.js
@@ -38,8 +38,5 @@ function getMatchingFiles(fileList, manager, fileMatch) {
     );
   }
   // filter out duplicates
-  matchedFiles = matchedFiles.filter(
-    (item, pos) => matchedFiles.indexOf(item) === pos
-  );
-  return matchedFiles;
+  return [...new Set(matchedFiles)];
 }