diff --git a/.github/workflows/doc.yaml b/.github/workflows/doc.yaml
index a658e54..8593837 100644
--- a/.github/workflows/doc.yaml
+++ b/.github/workflows/doc.yaml
@@ -15,7 +15,7 @@ jobs:
     strategy:
       max-parallel: 4
       matrix:
-        python-version: [ 3.7 ]
+        python-version: [ 3.12 ]
     steps:
       - uses: actions/checkout@v1
       - name: Set up Python ${{ matrix.python-version }}
@@ -24,7 +24,7 @@ jobs:
           python-version: ${{ matrix.python-version }}
       - name: Install
         run: |
-          python -m pip install --upgrade pip
+          python -m pip install --upgrade pip setuptools
           pip install .[doc]
       - name: Build documentation
         run: |
diff --git a/.github/workflows/linux.yaml b/.github/workflows/linux.yaml
index a80c590..8c3b8ef 100644
--- a/.github/workflows/linux.yaml
+++ b/.github/workflows/linux.yaml
@@ -10,7 +10,7 @@ jobs:
 
     strategy:
       matrix:
-        python-version: ['3.6', '3.7', '3.8', '3.9', '3.10']
+        python-version: ['3.7', '3.10', '3.12']
 
     steps:
       - name: Checkout phonemizer
@@ -28,8 +28,8 @@ jobs:
 
       - name: Install phonemizer
         run: |
-          pip install --upgrade pip pytest pytest-cov
-          python setup.py install
+          pip install --upgrade pip pytest pytest-cov setuptools
+          pip install .
 
       - name: Version phonemizer
         run: phonemize --version
@@ -38,7 +38,7 @@ jobs:
         run: pytest -v --cov=phonemizer --cov-report=xml test/
 
       - name: Upload coverage to Codecov
-        if: ${{ matrix.python-version == '3.9' }}
+        if: ${{ matrix.python-version == '3.10' }}
         uses: codecov/codecov-action@v2
         with:
           files: coverage.xml
@@ -49,7 +49,10 @@ jobs:
 
     strategy:
       matrix:
-        espeak-version: ['1.48.03', '1.49.2', '1.50']
+        # we used to test espeak-1.49 and 1.50 here but cannot be compiled
+        # anymore (ld error when linking speak-ng executable). I suppose some
+        # incompatbilty between old code / new compiler.
+        espeak-version: ['1.48.15', '1.51.1']
 
     steps:
       - name: Checkout phonemizer
@@ -61,14 +64,14 @@ jobs:
       - name: Install system dependencies
         run: |
           sudo apt-get update
-          sudo apt-get install festival mbrola mbrola-fr1
+          sudo apt-get install festival mbrola mbrola-fr1 mbrola-af1
 
       - name: Install espeak-1.48
-        if: ${{ matrix.espeak-version == '1.48.03' }}
-        run: sudo apt install espeak
+        if: ${{ matrix.espeak-version == '1.48.15' }}
+        run: sudo apt-get install espeak
 
       - name: Install espeak>=1.49
-        if: ${{ matrix.espeak-version != '1.48.03' }}
+        if: ${{ matrix.espeak-version != '1.48.15' }}
         env:
           ESPEAK_VERSION: ${{ matrix.espeak-version }}
         run: |
@@ -77,15 +80,15 @@ jobs:
           cd espeak-ng
           ./autogen.sh
           ./configure
-          make
+          make src/espeak-ng
           sudo make install
           sudo ldconfig
           espeak --version
 
       - name: Install phonemizer
         run: |
-          pip install --upgrade pip pytest
-          python setup.py install
+          pip install --upgrade pip pytest setuptools
+          pip install .
 
       - name: Version phonemizer
         run: phonemize --version
diff --git a/.github/workflows/macos.yaml b/.github/workflows/macos.yaml
index 240f9ae..b21e5d2 100644
--- a/.github/workflows/macos.yaml
+++ b/.github/workflows/macos.yaml
@@ -46,7 +46,7 @@ jobs:
 
       - name: Install phonemizer
         run: |
-          pip install --upgrade pip
+          pip install --upgrade pip setuptools
           python setup.py install
           pip install --upgrade pytest
 
diff --git a/.github/workflows/windows.yaml b/.github/workflows/windows.yaml
index 8fe65f1..a5d595b 100644
--- a/.github/workflows/windows.yaml
+++ b/.github/workflows/windows.yaml
@@ -50,7 +50,7 @@ jobs:
 
       - name: Install phonemizer
         run: |
-          pip install pytest
+          pip install pytest setuptools
           python setup.py install
 
       - name: Version phonemizer
diff --git a/.gitignore b/.gitignore
index 4a1486f..f082e9b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,5 +11,6 @@ htmlcov/*
 test/htmlcov
 paper/*
 .idea
+*.~undo-tree~
 
 docs/build
\ No newline at end of file
diff --git a/test/test_punctuation.py b/test/test_punctuation.py
index 8e5ff25..7c31ee1 100644
--- a/test/test_punctuation.py
+++ b/test/test_punctuation.py
@@ -29,7 +29,7 @@
 ESPEAK_150 = (EspeakBackend.version() >= (1, 50))
 
 # True if we are using espeak>=1.49.3
-ESPEAK_143 = (EspeakBackend.version() >= (1, 49, 3))
+ESPEAK_149 = (EspeakBackend.version() >= (1, 49, 3))
 
 # True if we are using festival>=2.5
 FESTIVAL_25 = (FestivalBackend.version() >= (2, 5))
@@ -69,13 +69,14 @@ def test_preserve(inp):
 
 @pytest.mark.parametrize(
     'text, expected_restore, expected_output', [
-        (['hi; ho,"'], ['hi; ho," '], ['haɪ; hoʊ, ']),
-        (['hi; "ho,'], ['hi; "ho, '], ['haɪ; hoʊ, '] if ESPEAK_143 else ['haɪ;  hoʊ, ']),
-        (['"hi; ho,'], ['"hi; ho, '], ['haɪ; hoʊ, '] if ESPEAK_143 else [' haɪ; hoʊ, '])])
+        (['hi; hi,"'], ['hi; hi," '], ['haɪ; haɪ, ']),
+        (['hi; "hi,'], ['hi; "hi, '], ['haɪ; haɪ, '] if ESPEAK_149 else ['haɪ;  haɪ, ']),
+        (['"hi; hi,'], ['"hi; hi, '], ['haɪ; haɪ, '] if ESPEAK_149 else [' haɪ; haɪ, '])])
 def test_preserve_2(text, expected_restore, expected_output):
     marks = ".!;:,?"
     punct = Punctuation(marks=marks)
-    assert expected_restore == punct.restore(*punct.preserve(text), sep=default_separator, strip=False)
+    assert expected_restore == punct.restore(
+        *punct.preserve(text), sep=default_separator, strip=False)
 
     output = phonemize(
         text, backend="espeak",