diff --git a/bidscoin/bidseditor.py b/bidscoin/bidseditor.py
index ea487406..6d560e14 100755
--- a/bidscoin/bidseditor.py
+++ b/bidscoin/bidseditor.py
@@ -1251,7 +1251,7 @@ def fill_table(self, table: QTableWidget, data: list):
             if table.objectName()=='bids' and key=='suffix' and self.target_datatype in self.bidsdatatypes:
                 table.setItem(i, 0, MyWidgetItem('suffix', iseditable=False))
                 suffix   = self.datasource.dynamicvalue(self.target_run['bids'].get('suffix',''))
-                suffixes = sorted(self.allowed_suffixes.get(self.target_datatype, ['']))
+                suffixes = sorted(self.allowed_suffixes.get(self.target_datatype, ['']), key=str.casefold)
                 suffix_dropdown = self.suffix_dropdown = QComboBox()
                 suffix_dropdown.addItems(suffixes)
                 suffix_dropdown.setCurrentIndex(suffix_dropdown.findText(suffix))