diff --git a/src/ipymolstar/widget.py b/src/ipymolstar/widget.py
index 59eae44..3198794 100644
--- a/src/ipymolstar/widget.py
+++ b/src/ipymolstar/widget.py
@@ -18,7 +18,7 @@
 
 class PDBeMolstar(anywidget.AnyWidget):
     _esm = pathlib.Path(__file__).parent / "widget.js"
-    _css = pathlib.Path(__file__).parent / "widget.css"
+    _css = pathlib.Path(__file__).parent / "pdbe-light.css"
     value = traitlets.Int(0).tag(sync=True)
 
     molecule_id = traitlets.Unicode().tag(sync=True)