diff --git a/wise-webapp/src/main/java/com/wisemapping/model/MindMapHistory.java b/wise-webapp/src/main/java/com/wisemapping/model/MindMapHistory.java
index 234c66fc..d2cda181 100755
--- a/wise-webapp/src/main/java/com/wisemapping/model/MindMapHistory.java
+++ b/wise-webapp/src/main/java/com/wisemapping/model/MindMapHistory.java
@@ -18,8 +18,10 @@
 
 package com.wisemapping.model;
 
+import com.wisemapping.util.ZipUtils;
 import org.jetbrains.annotations.Nullable;
 
+import java.io.IOException;
 import java.util.Calendar;
 
 public class MindMapHistory {
@@ -71,7 +73,7 @@ public class MindMapHistory {
         return xml;
     }
 
-    public void setXml(byte[] xml) {
-        this.xml = xml;
+    public byte[] getUnzipXml() throws IOException {
+        return ZipUtils.zipToBytes(xml);
     }
 }
diff --git a/wise-webapp/src/main/java/com/wisemapping/rest/MindmapController.java b/wise-webapp/src/main/java/com/wisemapping/rest/MindmapController.java
index 3bb21bfe..cfddc4ff 100644
--- a/wise-webapp/src/main/java/com/wisemapping/rest/MindmapController.java
+++ b/wise-webapp/src/main/java/com/wisemapping/rest/MindmapController.java
@@ -120,7 +120,7 @@ public class MindmapController extends BaseController {
 
     @RequestMapping(value = "maps/{id}/history/{hid}", method = RequestMethod.POST)
     @ResponseStatus(value = HttpStatus.NO_CONTENT)
-    public void updateRevertMindmap(@PathVariable int id, @PathVariable String hid) throws WiseMappingException {
+    public void updateRevertMindmap(@PathVariable int id, @PathVariable String hid) throws WiseMappingException, IOException {
         final Mindmap mindmap = mindmapService.findMindmapById(id);
         final User user = Utils.getUser();
 
@@ -129,7 +129,7 @@ public class MindmapController extends BaseController {
             List<MindMapHistory> mindmapHistory = mindmapService.findMindmapHistory(id);
             if (mindmapHistory.size() > 0) {
                 final MindMapHistory mindMapHistory = mindmapHistory.get(0);
-                mindmap.setXml(mindMapHistory.getXml());
+                mindmap.setZippedXml(mindMapHistory.getXml());
                 saveMindmapDocument(true, mindmap, user);
             }
         } else {
@@ -188,7 +188,7 @@ public class MindmapController extends BaseController {
         // I should not return byte, but there is some encoding issue here. Further research needed.
         response.setCharacterEncoding("UTF-8");
         final MindMapHistory mindmapHistory = mindmapService.findMindmapHistory(id, hid);
-        return mindmapHistory.getXml();
+        return mindmapHistory.getUnzipXml();
     }
 
 
diff --git a/wise-webapp/src/main/webapp/jsp/mindmapEditor.jsp b/wise-webapp/src/main/webapp/jsp/mindmapEditor.jsp
index ca3a9582..844a77a6 100644
--- a/wise-webapp/src/main/webapp/jsp/mindmapEditor.jsp
+++ b/wise-webapp/src/main/webapp/jsp/mindmapEditor.jsp
@@ -45,7 +45,7 @@
                 );
             </c:if>
             <c:if test="${memoryPersistence || readOnlyMode}">
-                    options.persistenceManager = new mindplot.LocalStorageManager("c/restful/maps/{id}${hid!=null?'/'+hid:''}/document/xml${principal!=null?'':'-pub'}");
+                    options.persistenceManager = new mindplot.LocalStorageManager("c/restful/maps/{id}${hid!=null?'/':''}${hid!=null?hid:''}/document/xml${principal!=null?'':'-pub'}");
             </c:if>
 
                 var userOptions = ${mindmap.properties};