diff --git a/qim3d/gui/__init__.py b/qim3d/gui/__init__.py
index 587172370535ebad2ed6b7d03296ecd6a300530f..cc7c9ff40272df922cf79a315cf8729e98f6a858 100644
--- a/qim3d/gui/__init__.py
+++ b/qim3d/gui/__init__.py
@@ -5,7 +5,7 @@ from . import iso3d
 from . import local_thickness
 from . import annotation_tool
 from . import layers2d
-from .qim_theme import QIMTheme
+from .qim_theme import QimTheme
 
 
 def run_gradio_app(gradio_interface, host="0.0.0.0"):