diff --git a/python/educational-core/src/com/jetbrains/edu/learning/courseFormat/tasks/Task.java b/python/educational-core/src/com/jetbrains/edu/learning/courseFormat/tasks/Task.java
index f5467dddee04..744309aecf39 100644
--- a/python/educational-core/src/com/jetbrains/edu/learning/courseFormat/tasks/Task.java
+++ b/python/educational-core/src/com/jetbrains/edu/learning/courseFormat/tasks/Task.java
@@ -233,7 +233,7 @@ public class Task implements StudyItem {
 
   public Task copy() {
     Element element = XmlSerializer.serialize(this);
-    Task copy = XmlSerializer.deserialize(element, Task.class);
+    Task copy = XmlSerializer.deserialize(element, getClass());
     copy.initTask(null, true);
     return copy;
   }