diff --git a/.github/workflows/pylint.yml b/.github/workflows/pylint.yml
index 9e1a1a1..13295ce 100644
--- a/.github/workflows/pylint.yml
+++ b/.github/workflows/pylint.yml
@@ -11,11 +11,11 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
     - name: Set up Python 3
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
-        python-version: '3.9'
+        python-version: '3.10'
         cache: 'pip'
         cache-dependency-path: 'requirements_dev.txt'
     - name: Install dependencies
diff --git a/.github/workflows/win_tests.yml b/.github/workflows/win_tests.yml
index 77e9919..8dd5000 100644
--- a/.github/workflows/win_tests.yml
+++ b/.github/workflows/win_tests.yml
@@ -11,11 +11,11 @@ jobs:
     runs-on: windows-latest
     strategy:
       matrix:
-        python-version: ['3.9', '3.10', '3.11', '3.12']
+        python-version: ['3.10', '3.11', '3.12', '3.13', '3.14']
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python-version }}
           cache: 'pip'
diff --git a/tests/test_datatypes.py b/tests/test_datatypes.py
index 0773175..cd2107b 100644
--- a/tests/test_datatypes.py
+++ b/tests/test_datatypes.py
@@ -1,109 +1,109 @@
-"""
-Copyright DEWETRON GmbH 2022
-
-Dmd reader library - Unit Tests for internal demo DMD datatypes
-"""
-
-
-import pyDmdReader
-
-
-DMD_FILE = "DMD_DEMO_FILE"
-
-
-def test_check_demo_file():
-    dmd = pyDmdReader.DmdReader(DMD_FILE)
-    assert dmd.version.major == 1 and dmd.version.minor >= 1
-
-    assert len(dmd.channel_names) >= 5
-
-    assert dmd.channel_names[0] == "AI 0/0 (Demo)"
-    channel = dmd.channels["AI 0/0 (Demo)"]
-    assert channel.description == "DEMO Analog"
-    assert channel.unit == "V"
-    assert channel.sample_rate == 10000.0
-    assert channel.dtype == "float64"
-    data = dmd.read_dataframe("AI 0/0 (Demo)")
-    assert len(data) == 40002
-    assert len(data.columns) == 1
-    assert data.dtypes[0] == "float64"
-
-    assert dmd.channel_names[1] == "Cnt 0/0 (Demo)"
-    channel = dmd.channels["Cnt 0/0 (Demo)"]
-    assert channel.dtype == "float64"
-    data = dmd.read_dataframe("Cnt 0/0 (Demo)")
-    assert len(data) == 10000
-    assert len(data.columns) == 1
-    assert data.dtypes[0] == "float64"
-
-    assert dmd.channel_names[2] == "DI 1/1 (Demo)"
-    channel = dmd.channels["DI 1/1 (Demo)"]
-    assert channel.dtype == "i4"
-    data = dmd.read_dataframe("DI 1/1 (Demo)")
-    assert len(data) == 10000
-    assert len(data.columns) == 1
-    assert data.dtypes[0] == "int32"
-    assert data.iloc[0].name == 0.000
-    assert data.iloc[0][0] == 0
-    assert data.iloc[1].name == 0.001
-    assert data.iloc[1][0] == 1
-
-    assert dmd.channel_names[3] == "VC 1/1 (Demo)"
-    channel = dmd.channels["VC 1/1 (Demo)"]
-    assert channel.dtype == "complex128"
-    data = dmd.read_dataframe("VC 1/1 (Demo)")
-    assert len(data) == 10000
-    assert len(data.columns) == 5
-    assert data.dtypes[0] == "complex128"
-
-    assert dmd.channel_names[4] == "VS 1/1 (Demo)"
-    channel = dmd.channels["VS 1/1 (Demo)"]
-    assert channel.dtype == "float64"
-    data = dmd.read_dataframe("VS 1/1 (Demo)")
-    assert len(data) == 10000
-    assert len(data.columns) == 10
-    assert data.columns[0] == "VS 1/1 (Demo)[0]"
-    assert data.dtypes[0] == "float64"
-    assert data.iloc[0].name == 0.000
-    assert sum(abs(data.iloc[0] - [0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9])) < 1e-15
-
-    dmd.close()
-
-def test_check_demo_file_unique_ids():
-    dmd = pyDmdReader.DmdReader(DMD_FILE)
-    assert dmd.version.major == 1 and dmd.version.minor >= 1
-
-    assert len(dmd.channel_names) == len(dmd.channel_ids)
-
-    channel = dmd.channels["AI 0/0 (Demo)"]
-    unique_id = channel.handle.value
-    channel2 = dmd.allchannels[unique_id]
-    assert channel.name == channel2.name
-    assert channel == channel2
-
-def test_check_demo_file_multicolumn():
-    dmd = pyDmdReader.DmdReader(DMD_FILE)
-    data = dmd.read_dataframe(["Cnt 0/0 (Demo)", "DI 1/1 (Demo)", "VS 1/1 (Demo)"])
-
-    assert len(data.dtypes) == 12
-    assert data.dtypes[0] == "float64"
-    assert data.dtypes[1] == "int32"
-    assert data.dtypes[2] == "float64"
-
-    dmd.close()
-
-def test_version():
-    v = pyDmdReader.Version(1,2)
-    assert v.major == 1
-    assert v.minor == 2
-    assert v.micro == 0
-    assert str(v) == "1.2"
-
-    v = pyDmdReader.Version(1,2,3)
-    assert v.major == 1
-    assert v.minor == 2
-    assert v.micro == 3
-    assert str(v) == "1.2.3"
-
-    assert str(pyDmdReader.Version.parse("9.8")) == "9.8"
-    assert str(pyDmdReader.Version.parse("9.8.7")) == "9.8.7"
+"""
+Copyright DEWETRON GmbH 2022
+
+Dmd reader library - Unit Tests for internal demo DMD datatypes
+"""
+
+
+import pyDmdReader
+
+
+DMD_FILE = "DMD_DEMO_FILE"
+
+
+def test_check_demo_file():
+    dmd = pyDmdReader.DmdReader(DMD_FILE)
+    assert dmd.version.major == 1 and dmd.version.minor >= 1
+
+    assert len(dmd.channel_names) >= 5
+
+    assert dmd.channel_names[0] == "AI 0/0 (Demo)"
+    channel = dmd.channels["AI 0/0 (Demo)"]
+    assert channel.description == "DEMO Analog"
+    assert channel.unit == "V"
+    assert channel.sample_rate == 10000.0
+    assert channel.dtype == "float64"
+    data = dmd.read_dataframe("AI 0/0 (Demo)")
+    assert len(data) == 40002
+    assert len(data.columns) == 1
+    assert data.dtypes.iloc[0] == "float64"
+
+    assert dmd.channel_names[1] == "Cnt 0/0 (Demo)"
+    channel = dmd.channels["Cnt 0/0 (Demo)"]
+    assert channel.dtype == "float64"
+    data = dmd.read_dataframe("Cnt 0/0 (Demo)")
+    assert len(data) == 10000
+    assert len(data.columns) == 1
+    assert data.dtypes.iloc[0] == "float64"
+
+    assert dmd.channel_names[2] == "DI 1/1 (Demo)"
+    channel = dmd.channels["DI 1/1 (Demo)"]
+    assert channel.dtype == "i4"
+    data = dmd.read_dataframe("DI 1/1 (Demo)")
+    assert len(data) == 10000
+    assert len(data.columns) == 1
+    assert data.dtypes.iloc[0] == "int32"
+    assert data.iloc[0].name == 0.000
+    assert data.iloc[0, 0] == 0
+    assert data.iloc[1].name == 0.001
+    assert data.iloc[1, 0] == 1
+
+    assert dmd.channel_names[3] == "VC 1/1 (Demo)"
+    channel = dmd.channels["VC 1/1 (Demo)"]
+    assert channel.dtype == "complex128"
+    data = dmd.read_dataframe("VC 1/1 (Demo)")
+    assert len(data) == 10000
+    assert len(data.columns) == 5
+    assert data.dtypes.iloc[0] == "complex128"
+
+    assert dmd.channel_names[4] == "VS 1/1 (Demo)"
+    channel = dmd.channels["VS 1/1 (Demo)"]
+    assert channel.dtype == "float64"
+    data = dmd.read_dataframe("VS 1/1 (Demo)")
+    assert len(data) == 10000
+    assert len(data.columns) == 10
+    assert data.columns[0] == "VS 1/1 (Demo)[0]"
+    assert data.dtypes.iloc[0] == "float64"
+    assert data.iloc[0].name == 0.000
+    assert sum(abs(data.iloc[0] - [0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9])) < 1e-15
+
+    dmd.close()
+
+def test_check_demo_file_unique_ids():
+    dmd = pyDmdReader.DmdReader(DMD_FILE)
+    assert dmd.version.major == 1 and dmd.version.minor >= 1
+
+    assert len(dmd.channel_names) == len(dmd.channel_ids)
+
+    channel = dmd.channels["AI 0/0 (Demo)"]
+    unique_id = channel.handle.value
+    channel2 = dmd.allchannels[unique_id]
+    assert channel.name == channel2.name
+    assert channel == channel2
+
+def test_check_demo_file_multicolumn():
+    dmd = pyDmdReader.DmdReader(DMD_FILE)
+    data = dmd.read_dataframe(["Cnt 0/0 (Demo)", "DI 1/1 (Demo)", "VS 1/1 (Demo)"])
+
+    assert len(data.dtypes) == 12
+    assert data.dtypes.iloc[0] == "float64"
+    assert data.dtypes.iloc[1] == "int32"
+    assert data.dtypes.iloc[2] == "float64"
+
+    dmd.close()
+
+def test_version():
+    v = pyDmdReader.Version(1,2)
+    assert v.major == 1
+    assert v.minor == 2
+    assert v.micro == 0
+    assert str(v) == "1.2"
+
+    v = pyDmdReader.Version(1,2,3)
+    assert v.major == 1
+    assert v.minor == 2
+    assert v.micro == 3
+    assert str(v) == "1.2.3"
+
+    assert str(pyDmdReader.Version.parse("9.8")) == "9.8"
+    assert str(pyDmdReader.Version.parse("9.8.7")) == "9.8.7"