diff --git a/README.md b/README.md
index 358f542..d01742e 100644
--- a/README.md
+++ b/README.md
@@ -426,8 +426,14 @@ Special worksheet keys (accessible as `worksheet[key]`, each starting with `!`):
 
 `wb.Sheets[sheetname]` returns an object representing the worksheet.
 
-`wb.Props` is an object storing the standard properties.  `wb.Custprops` stores
-custom properties.  Since the XLS standard properties deviate from the XLSX
+`wb.Props` is an object storing the standard properties.   The following properties are written but not parsed:
+    - `title`
+    - `subject`
+    - `description`
+    - `keywords`
+    - `creator`
+
+`wb.Custprops` stores custom properties.  Since the XLS standard properties deviate from the XLSX
 standard, XLS parsing stores core properties in both places.  .
 
 
diff --git a/bits/33_coreprops.js b/bits/33_coreprops.js
index 27d432f..6ea7d82 100644
--- a/bits/33_coreprops.js
+++ b/bits/33_coreprops.js
@@ -60,13 +60,20 @@ function cp_doit(f, g, h, o, p) {
 
 function write_core_props(cp, opts) {
 	var o = [XML_HEADER, CORE_PROPS_XML_ROOT], p = {};
-	if(!cp) return o.join("");
+  if (opts && opts.Props) {
+    if (opts.Props.title) o[o.length]       = '<dc:title>'       + opts.Props.title        + '</dc:title>';
+    if (opts.Props.subject) o[o.length]     = '<dc:subject>'     + opts.Props.subject      + '</dc:subject>';
+    if (opts.Props.creator) o[o.length]     = '<dc:creator>'     + opts.Props.creator      + '</dc:creator>';
+    if (opts.Props.keywords) o[o.length]    = '<cp:keywords>'    + opts.Props.keywords      + '</cp:keywords>';
+    if (opts.Props.description) o[o.length] = '<dc:description>' + opts.Props.description  + '</dc:description>';
+  }
+  if(cp) {
 
+    if(cp.CreatedDate != null) cp_doit("dcterms:created", typeof cp.CreatedDate === "string" ? cp.CreatedDate : write_w3cdtf(cp.CreatedDate, opts.WTF), {"xsi:type":"dcterms:W3CDTF"}, o, p);
+    if(cp.ModifiedDate != null) cp_doit("dcterms:modified", typeof cp.ModifiedDate === "string" ? cp.ModifiedDate : write_w3cdtf(cp.ModifiedDate, opts.WTF), {"xsi:type":"dcterms:W3CDTF"}, o, p);
 
-	if(cp.CreatedDate != null) cp_doit("dcterms:created", typeof cp.CreatedDate === "string" ? cp.CreatedDate : write_w3cdtf(cp.CreatedDate, opts.WTF), {"xsi:type":"dcterms:W3CDTF"}, o, p);
-	if(cp.ModifiedDate != null) cp_doit("dcterms:modified", typeof cp.ModifiedDate === "string" ? cp.ModifiedDate : write_w3cdtf(cp.ModifiedDate, opts.WTF), {"xsi:type":"dcterms:W3CDTF"}, o, p);
-
-	for(var i = 0; i != CORE_PROPS.length; ++i) { var f = CORE_PROPS[i]; cp_doit(f[0], cp[f[1]], null, o, p); }
-	if(o.length>2){ o[o.length] = ('</cp:coreProperties>'); o[1]=o[1].replace("/>",">"); }
-	return o.join("");
+  	for(var i = 0; i != CORE_PROPS.length; ++i) { var f = CORE_PROPS[i]; cp_doit(f[0], cp[f[1]], null, o, p); }
+  }
+  if(o.length>2){ o[o.length] = ('</cp:coreProperties>'); o[1]=o[1].replace("/>",">"); }
+  return o.join("");
 }
diff --git a/xlsx.js b/xlsx.js
index e598122..8168609 100644
--- a/xlsx.js
+++ b/xlsx.js
@@ -2602,15 +2602,22 @@ function cp_doit(f, g, h, o, p) {
 
 function write_core_props(cp, opts) {
 	var o = [XML_HEADER, CORE_PROPS_XML_ROOT], p = {};
-	if(!cp) return o.join("");
+  if (opts && opts.Props) {
+    if (opts.Props.title) o[o.length]       = '<dc:title>'       + opts.Props.title        + '</dc:title>';
+    if (opts.Props.subject) o[o.length]     = '<dc:subject>'     + opts.Props.subject      + '</dc:subject>';
+    if (opts.Props.creator) o[o.length]     = '<dc:creator>'     + opts.Props.creator      + '</dc:creator>';
+    if (opts.Props.keywords) o[o.length]    = '<cp:keywords>'    + opts.Props.keywords      + '</cp:keywords>';
+    if (opts.Props.description) o[o.length] = '<dc:description>' + opts.Props.description  + '</dc:description>';
+  }
+  if(cp) {
 
+    if(cp.CreatedDate != null) cp_doit("dcterms:created", typeof cp.CreatedDate === "string" ? cp.CreatedDate : write_w3cdtf(cp.CreatedDate, opts.WTF), {"xsi:type":"dcterms:W3CDTF"}, o, p);
+    if(cp.ModifiedDate != null) cp_doit("dcterms:modified", typeof cp.ModifiedDate === "string" ? cp.ModifiedDate : write_w3cdtf(cp.ModifiedDate, opts.WTF), {"xsi:type":"dcterms:W3CDTF"}, o, p);
 
-	if(cp.CreatedDate != null) cp_doit("dcterms:created", typeof cp.CreatedDate === "string" ? cp.CreatedDate : write_w3cdtf(cp.CreatedDate, opts.WTF), {"xsi:type":"dcterms:W3CDTF"}, o, p);
-	if(cp.ModifiedDate != null) cp_doit("dcterms:modified", typeof cp.ModifiedDate === "string" ? cp.ModifiedDate : write_w3cdtf(cp.ModifiedDate, opts.WTF), {"xsi:type":"dcterms:W3CDTF"}, o, p);
-
-	for(var i = 0; i != CORE_PROPS.length; ++i) { var f = CORE_PROPS[i]; cp_doit(f[0], cp[f[1]], null, o, p); }
-	if(o.length>2){ o[o.length] = ('</cp:coreProperties>'); o[1]=o[1].replace("/>",">"); }
-	return o.join("");
+  	for(var i = 0; i != CORE_PROPS.length; ++i) { var f = CORE_PROPS[i]; cp_doit(f[0], cp[f[1]], null, o, p); }
+  }
+  if(o.length>2){ o[o.length] = ('</cp:coreProperties>'); o[1]=o[1].replace("/>",">"); }
+  return o.join("");
 }
 /* 15.2.12.3 Extended File Properties Part */
 /* [MS-OSHARED] 2.3.3.2.[1-2].1 (PIDSI/PIDDSI) */