diff --git a/a2p_MuxAssembly.py b/a2p_MuxAssembly.py
index 1251ba2..d4486e0 100644
--- a/a2p_MuxAssembly.py
+++ b/a2p_MuxAssembly.py
@@ -217,6 +217,12 @@ def __getstate__(self):
     def __setstate__(self, state):
         return None
 
+    def dumps(self):
+        return None
+
+    def loads(self, state):
+        return None
+
     def getIcon(self):
         return a2plib.path_a2p + '/icons/SimpleAssemblyShape.svg'
 
diff --git a/a2p_importedPart_class.py b/a2p_importedPart_class.py
index 2da8b9b..0ad0b41 100644
--- a/a2p_importedPart_class.py
+++ b/a2p_importedPart_class.py
@@ -82,7 +82,13 @@ def onDocumentRestored(self,obj):
     def __getstate__(self):
         return None
 
-    def __setstate__(self,state):
+    def __setstate__(self, state):
+        return None
+
+    def dumps(self):
+        return None
+
+    def loads(self, state):
         return None
 
     def execute(self, obj):
@@ -163,6 +169,12 @@ def __getstate__(self):
     def __setstate__(self, state):
         return None
 
+    def dumps(self):
+        return None
+
+    def loads(self, state):
+        return None
+
     def attach(self, vobj):
         self.object_Name = vobj.Object.Name
         self.Object = vobj.Object
diff --git a/a2p_lcs_support.py b/a2p_lcs_support.py
index 166509b..7a3647c 100644
--- a/a2p_lcs_support.py
+++ b/a2p_lcs_support.py
@@ -88,7 +88,13 @@ def getIcon(self):
     def __getstate__(self):
         return None
 
-    def __setstate__(self,state):
+    def __setstate__(self, state):
+        return None
+
+    def dumps(self):
+        return None
+
+    def loads(self, state):
         return None
 
 #==============================================================================
diff --git a/package.xml b/package.xml
index 17835b3..76df1ac 100644
--- a/package.xml
+++ b/package.xml
@@ -2,7 +2,7 @@
 <package format="1" xmlns="https://wiki.freecad.org/Package_Metadata">
   <name>A2plus</name>
   <description>Another assembly workbench for FreeCAD, following and extending Hamish's Assembly 2 workbench hence Assembly2plus. The main goal of A2plus is to create a very simple, easy to use, and not over-featured workbench for FreeCAD assemblies. Using the KISS principle: KEEP IT SIMPLE, STUPID</description>
-  <version>0.4.61</version>
+  <version>0.4.62</version>
   <date>2022-01-24</date>
   <maintainer email="kbwbe@gmx.de">kbwbe</maintainer>
   <license file="LICENSE">LGPLv2.1</license>