diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1c80bc2..ea586dc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,12 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 
+## [0.3.1] - 2024-10-08
+
+### Fixed
+
+- core.DataFrameTableModel: fixed issue with sorting
+
 ## [0.3.0] - 2024-10-08
 
 ### Added
@@ -55,6 +61,7 @@ _First release._
 - core.ColoredDataFrameTableModel: An extension of DataFrameTableModel providing color-mapped numerical data.
 - widgets.StatefulButton: A QPushButton that maintains an active/inactive state.
 
+[0.3.1]: https://github.com/int-brain-lab/iblqt/releases/tag/v0.3.1
 [0.3.0]: https://github.com/int-brain-lab/iblqt/releases/tag/v0.3.0
 [0.2.0]: https://github.com/int-brain-lab/iblqt/releases/tag/v0.2.0
 [0.1.2]: https://github.com/int-brain-lab/iblqt/releases/tag/v0.1.2
diff --git a/iblqt/__init__.py b/iblqt/__init__.py
index 1ef9198..d4b4079 100644
--- a/iblqt/__init__.py
+++ b/iblqt/__init__.py
@@ -1,3 +1,3 @@
 """A collection of extensions to the Qt framework."""
 
-__version__ = '0.3.0'
+__version__ = '0.3.1'
diff --git a/iblqt/core.py b/iblqt/core.py
index 838155f..50ebecb 100644
--- a/iblqt/core.py
+++ b/iblqt/core.py
@@ -225,7 +225,9 @@ def sort(self, column: int, order: Qt.SortOrder = Qt.SortOrder.AscendingOrder):
             return
         columnName = self._dataFrame.columns[column]
         self.layoutAboutToBeChanged.emit()
-        self._dataFrame.sort_values(by=columnName, ascending=not order, inplace=True)
+        self._dataFrame.sort_values(
+            by=columnName, ascending=order == Qt.SortOrder.AscendingOrder, inplace=True
+        )
         self.layoutChanged.emit()
 
 
diff --git a/tests/test_core.py b/tests/test_core.py
index b05dc11..5fab9c3 100644
--- a/tests/test_core.py
+++ b/tests/test_core.py
@@ -10,14 +10,14 @@
 
 def test_dataframe_model(qtbot):
     # instantiation / setting of dataframe
-    df1 = pd.DataFrame({'X': [0, 1, 2], 'Y': ['A', 'B', 'C']})
+    df = pd.DataFrame({'X': [0, 1, 2], 'Y': ['A', 'B', 'C']})
     model = core.ColoredDataFrameTableModel()
     assert model.dataFrame.empty
-    model = core.ColoredDataFrameTableModel(dataFrame=df1)
-    assert model.dataFrame is not df1
-    assert model.dataFrame.equals(df1)
+    model = core.ColoredDataFrameTableModel(dataFrame=df)
+    assert model.dataFrame is not df
+    assert model.dataFrame.equals(df)
     with qtbot.waitSignal(model.modelReset, timeout=100):
-        model.dataFrame = df1
+        model.dataFrame = df
 
     # header data
     assert model.headerData(-1, Qt.Orientation.Horizontal) is None