diff --git a/bl_types/bl_scene.py b/bl_types/bl_scene.py
index a6e3de8..6cacca1 100644
--- a/bl_types/bl_scene.py
+++ b/bl_types/bl_scene.py
@@ -67,7 +67,8 @@ class BlScene(BlDatablock):
             deps.append(object)
         
         # world
-        deps.append(self.pointer.world)
+        if self.pointer.world:
+            deps.append(self.pointer.world)
         
         return deps
     
diff --git a/libs/replication b/libs/replication
index 5c89205..6b50d66 160000
--- a/libs/replication
+++ b/libs/replication
@@ -1 +1 @@
-Subproject commit 5c8920522f1d27e6833793ec6b6ff198e550630a
+Subproject commit 6b50d668faf372314b3ae2caa3a9b12f4deb461f