diff --git a/soitool/inline_editable_soi_view.py b/soitool/inline_editable_soi_view.py
index 949f561f5e2e264319fcbb971ee144fa0df6a8f1..e03234ce664ec683f899392e229b7679ae75dfe6 100644
--- a/soitool/inline_editable_soi_view.py
+++ b/soitool/inline_editable_soi_view.py
@@ -259,7 +259,7 @@ class InlineEditableSOIView(QScrollArea):
             "background-color: rgba(0,0,0,0%)"
         )
         label_copy_number_header.setFont(QFont("Times New Roman", 15))
-        # source: https://stackoverflow.com/a/8638114/3545896
+        # Source: https://stackoverflow.com/a/8638114/3545896
         # CAUTION: does not work if font is set through stylesheet
         label_width = (
             label_copy_number_header.fontMetrics()