diff --git a/in_gdtf.py b/in_gdtf.py
index cc2dda56..83d06bd7 100644
--- a/in_gdtf.py
+++ b/in_gdtf.py
@@ -148,7 +148,7 @@ def execute(self, context):
         return {"FINISHED"}
 
 
-if bpy.app.version >= (4, 0):
+if bpy.app.version >= (4, 1):
 
     class DMX_IO_FH_GDTF(bpy.types.FileHandler):
         bl_idname = "IO_FH_gdtf"
@@ -169,12 +169,12 @@ def menu_func_import(self, context):
 def register():
     bpy.utils.register_class(DMX_OT_Import_GDTF)
     bpy.types.TOPBAR_MT_file_import.append(menu_func_import)
-    if bpy.app.version >= (4, 0):
+    if bpy.app.version >= (4, 1):
         bpy.utils.register_class(DMX_IO_FH_GDTF)
 
 
 def unregister():
     bpy.types.TOPBAR_MT_file_import.remove(menu_func_import)
-    if bpy.app.version >= (4, 0):
+    if bpy.app.version >= (4, 1):
         bpy.utils.unregister_class(DMX_IO_FH_GDTF)
     bpy.utils.unregister_class(DMX_OT_Import_GDTF)
diff --git a/in_out_mvr.py b/in_out_mvr.py
index aebaddef..79324e9c 100644
--- a/in_out_mvr.py
+++ b/in_out_mvr.py
@@ -83,7 +83,7 @@ def execute(self, context):
         return {"FINISHED"}
 
 
-if bpy.app.version >= (4, 0):
+if bpy.app.version >= (4, 1):
 
     class DMX_IO_FH_MVR(bpy.types.FileHandler):
         bl_idname = "IO_FH_mvr"
@@ -111,14 +111,14 @@ def register():
     bpy.utils.register_class(DMX_OT_Export_MVR)
     bpy.types.TOPBAR_MT_file_import.append(menu_func_import)
     bpy.types.TOPBAR_MT_file_export.append(menu_func_export)
-    if bpy.app.version >= (4, 0):
+    if bpy.app.version >= (4, 1):
         bpy.utils.register_class(DMX_IO_FH_MVR)
 
 
 def unregister():
     bpy.types.TOPBAR_MT_file_import.remove(menu_func_import)
     bpy.types.TOPBAR_MT_file_export.remove(menu_func_export)
-    if bpy.app.version >= (4, 0):
+    if bpy.app.version >= (4, 1):
         bpy.utils.unregister_class(DMX_IO_FH_MVR)
     bpy.utils.unregister_class(DMX_OT_Import_MVR)
     bpy.utils.unregister_class(DMX_OT_Export_MVR)