diff --git a/wise-webapp/src/main/java/com/wisemapping/dao/MindmapManagerImpl.java b/wise-webapp/src/main/java/com/wisemapping/dao/MindmapManagerImpl.java
index b8cd3522..dd1d988a 100644
--- a/wise-webapp/src/main/java/com/wisemapping/dao/MindmapManagerImpl.java
+++ b/wise-webapp/src/main/java/com/wisemapping/dao/MindmapManagerImpl.java
@@ -235,7 +235,7 @@ public class MindmapManagerImpl
         getHibernateTemplate().delete(mindMap);
     }
 
-    private void saveHistory(@NotNull final Mindmap mindMap) throws IOException {
+    private void saveHistory(@NotNull final Mindmap mindMap)  {
         final MindMapHistory history = new MindMapHistory();
 
         history.setZippedXml(mindMap.getZippedXml());
diff --git a/wise-webapp/src/main/java/com/wisemapping/model/Mindmap.java b/wise-webapp/src/main/java/com/wisemapping/model/Mindmap.java
index 88ea3606..eae92e01 100644
--- a/wise-webapp/src/main/java/com/wisemapping/model/Mindmap.java
+++ b/wise-webapp/src/main/java/com/wisemapping/model/Mindmap.java
@@ -78,11 +78,14 @@ public class Mindmap {
         return result;
     }
 
-    public byte[] getZippedXml()
-            throws IOException {
+    public byte[] getZippedXml(){
         byte[] result = this.xml;
         if (result != null) {
-            result = ZipUtils.bytesToZip(result);
+            try {
+                result = ZipUtils.bytesToZip(result);
+            } catch (IOException e) {
+                throw new IllegalStateException(e);
+            }
         }
         return result;
     }