diff --git a/wise-webapp/src/main/java/com/wisemapping/service/MindmapService.java b/wise-webapp/src/main/java/com/wisemapping/service/MindmapService.java
index b012c121..a78dd26d 100755
--- a/wise-webapp/src/main/java/com/wisemapping/service/MindmapService.java
+++ b/wise-webapp/src/main/java/com/wisemapping/service/MindmapService.java
@@ -23,6 +23,7 @@ import com.wisemapping.exceptions.WiseMappingException;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
+import java.io.IOException;
 import java.util.List;
 
 public interface MindmapService {
@@ -57,7 +58,7 @@ public interface MindmapService {
 
     boolean hasPermissions(@Nullable User user, int mapId, CollaborationRole allowedRole);
 
-    void revertChange(@NotNull Mindmap map, int historyId) throws WiseMappingException;
+    void revertChange(@NotNull Mindmap map, int historyId) throws WiseMappingException, IOException;
 
     MindMapHistory findMindmapHistory(int id, int hid) throws WiseMappingException;
 
diff --git a/wise-webapp/src/main/java/com/wisemapping/service/MindmapServiceImpl.java b/wise-webapp/src/main/java/com/wisemapping/service/MindmapServiceImpl.java
index e4fc70f8..05b6e1bf 100755
--- a/wise-webapp/src/main/java/com/wisemapping/service/MindmapServiceImpl.java
+++ b/wise-webapp/src/main/java/com/wisemapping/service/MindmapServiceImpl.java
@@ -28,6 +28,7 @@ import org.jetbrains.annotations.Nullable;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Qualifier;
 
+import java.io.IOException;
 import java.util.Calendar;
 import java.util.List;
 import java.util.Set;
@@ -242,9 +243,9 @@ public class MindmapServiceImpl
 
     @Override
     public void revertChange(@NotNull Mindmap mindmap, int historyId)
-            throws WiseMappingException {
+            throws WiseMappingException, IOException {
         final MindMapHistory history = mindmapManager.getHistory(historyId);
-        mindmap.setXml(history.getXml());
+        mindmap.setZippedXml(history.getXml());
         updateMindmap(mindmap, true);
     }