diff --git a/cura/CuraApplication.py b/cura/CuraApplication.py
index 2aa49e44ff..f944f4e277 100755
--- a/cura/CuraApplication.py
+++ b/cura/CuraApplication.py
@@ -178,7 +178,8 @@ class CuraApplication(QtApplication):
                 ("machine_stack", ContainerStack.Version): (self.ResourceTypes.MachineStack, "application/x-uranium-containerstack"),
                 ("extruder_train", ContainerStack.Version): (self.ResourceTypes.ExtruderStack, "application/x-uranium-extruderstack"),
                 ("preferences", Preferences.Version):               (Resources.Preferences, "application/x-uranium-preferences"),
-                ("user", InstanceContainer.Version * 1000000 + self.SettingVersion):       (self.ResourceTypes.UserInstanceContainer, "application/x-uranium-instancecontainer")
+                ("user", InstanceContainer.Version * 1000000 + self.SettingVersion):       (self.ResourceTypes.UserInstanceContainer, "application/x-uranium-instancecontainer"),
+                ("definition_changes", InstanceContainer.Version * 1000000 + self.SettingVersion): (self.ResourceTypes.DefinitionChangesContainer, "application/x-uranium-instancecontainer"),
             }
         )
 
diff --git a/plugins/VersionUpgrade/VersionUpgrade25to26/__init__.py b/plugins/VersionUpgrade/VersionUpgrade25to26/__init__.py
index a24473f65d..5ff589c4e3 100644
--- a/plugins/VersionUpgrade/VersionUpgrade25to26/__init__.py
+++ b/plugins/VersionUpgrade/VersionUpgrade25to26/__init__.py
@@ -22,9 +22,10 @@ def getMetaData():
             ("preferences", 4000000):     ("preferences", 4000001,     upgrade.upgradePreferences),
             # NOTE: All the instance containers share the same general/version, so we have to update all of them
             #       if any is updated.
-            ("quality_changes", 2000000): ("quality_changes", 2000001, upgrade.upgradeInstanceContainer),
-            ("user", 2000000):            ("user", 2000001,            upgrade.upgradeInstanceContainer),
-            ("quality", 2000000):         ("quality", 2000001,         upgrade.upgradeInstanceContainer),
+            ("quality_changes", 2000000):       ("quality_changes", 2000001,    upgrade.upgradeInstanceContainer),
+            ("user", 2000000):                  ("user", 2000001,               upgrade.upgradeInstanceContainer),
+            ("quality", 2000000):               ("quality", 2000001,            upgrade.upgradeInstanceContainer),
+            ("definition_changes", 2000000):    ("definition_changes", 2000001, upgrade.upgradeInstanceContainer),
         },
         "sources": {
             "quality_changes": {
@@ -39,6 +40,10 @@ def getMetaData():
                 "get_version": upgrade.getCfgVersion,
                 "location": {"./user"}
             },
+            "definition_changes": {
+                "get_version": upgrade.getCfgVersion,
+                "location": {"./machine_instances"}
+            }
         }
     }