diff --git a/lib/stream/xlsx/workbook-writer.js b/lib/stream/xlsx/workbook-writer.js
index db920c8bc..c16c7443e 100644
--- a/lib/stream/xlsx/workbook-writer.js
+++ b/lib/stream/xlsx/workbook-writer.js
@@ -193,7 +193,9 @@ WorkbookWriter.prototype = {
     return new PromishLib.Promish(function(resolve) {
       var xform = new RelationshipsXform();
       var xml = xform.toXml([
-        {Id: 'rId1', Type: RelType.OfficeDocument, Target: 'xl/workbook.xml'}
+        {Id: 'rId1', Type: RelType.OfficeDocument, Target: 'xl/workbook.xml'},
+        {Id: 'rId2', Type: RelType.CoreProperties, Target: 'docProps/core.xml'},
+        {Id: 'rId3', Type: RelType.ExtenderProperties, Target: 'docProps/app.xml'}
       ]);
       self.zip.append(xml, {name: '/_rels/.rels'});
       resolve();
diff --git a/lib/xlsx/rel-type.js b/lib/xlsx/rel-type.js
index dd602db2e..5dedbac64 100644
--- a/lib/xlsx/rel-type.js
+++ b/lib/xlsx/rel-type.js
@@ -15,4 +15,6 @@ module.exports = {
   Theme: 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/theme',
   Hyperlink: 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/hyperlink',
   Image: 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/image',
+  CoreProperties: 'http://schemas.openxmlformats.org/package/2006/relationships/metadata/core-properties',
+  ExtenderProperties: 'http://schemas.openxmlformats.org/officeDocument/2006/relationships/extended-properties',
 };
diff --git a/lib/xlsx/xlsx.js b/lib/xlsx/xlsx.js
index 51f9019b6..000edbeb9 100644
--- a/lib/xlsx/xlsx.js
+++ b/lib/xlsx/xlsx.js
@@ -472,7 +472,9 @@ XLSX.prototype = {
     return new PromishLib.Promish(function(resolve) {
       var xform = new RelationshipsXform();
       var xml = xform.toXml([
-          {Id: 'rId1', Type: XLSX.RelType.OfficeDocument, Target: 'xl/workbook.xml'}
+          {Id: 'rId1', Type: XLSX.RelType.OfficeDocument, Target: 'xl/workbook.xml'},
+          {Id: 'rId2', Type: XLSX.RelType.CoreProperties, Target: 'docProps/core.xml'},
+          {Id: 'rId3', Type: XLSX.RelType.ExtenderProperties, Target: 'docProps/app.xml'}
         ]);
       zip.append(xml, {name: '_rels/.rels'});
       resolve();