diff --git a/.github/workflows/build-without-conan.yml b/.github/workflows/build-without-conan.yml
index faa7aa4264..740f00987b 100644
--- a/.github/workflows/build-without-conan.yml
+++ b/.github/workflows/build-without-conan.yml
@@ -190,7 +190,7 @@ jobs:
         cmake --build  . -j2
         cmake --install .
     - name: Set up Python 3.10
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: "3.10"
     - name: Install pytket
diff --git a/.github/workflows/build_and_test.yml b/.github/workflows/build_and_test.yml
index 3cadc33dd5..a23609e420 100644
--- a/.github/workflows/build_and_test.yml
+++ b/.github/workflows/build_and_test.yml
@@ -30,7 +30,7 @@ jobs:
       tket_package_exists: ${{ steps.tket_package_exists.outputs.tket_package_exists }}
     steps:
     - uses: actions/checkout@v4
-    - uses: actions/setup-python@v4
+    - uses: actions/setup-python@v5
       with:
         python-version: '3.11'
     - uses: dorny/paths-filter@v2.11.1
@@ -106,7 +106,7 @@ jobs:
       run: sudo apt update
     - name: Select Python 3.10
       # otherwise turtlebrowser/get-conan@v1.2 fails on macos-12
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: '3.10'
     - name: Install conan
@@ -260,17 +260,17 @@ jobs:
         conan create recipes/pybind11_json/all --version 0.2.13
     - name: Set up Python (pull request)
       if: github.event_name == 'pull_request' || github.event_name == 'workflow_dispatch'
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: "3.9"
     - name: Set up Python (push)
       if: github.event_name == 'push'
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: "3.10"
     - name: Set up Python (schedule)
       if: github.event_name == 'schedule'
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: "3.11"
     - name: Build pytket
@@ -330,7 +330,7 @@ jobs:
     - uses: actions/checkout@v4
     - name: Select Python 3.10
       # otherwise turtlebrowser/get-conan@v1.2 fails on macos-12
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: '3.10'
     - name: Install conan
@@ -370,12 +370,12 @@ jobs:
       run: brew install python@3.9
     - name: Set up Python (push)
       if: github.event_name == 'push'
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: "3.10"
     - name: Set up Python (schedule)
       if: github.event_name == 'schedule'
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: "3.11"
     - name: Build pytket
@@ -484,17 +484,17 @@ jobs:
         conan create recipes/pybind11_json/all --version 0.2.13
     - name: Set up Python (3.9)
       if: github.event_name == 'pull_request' || github.event_name == 'workflow_dispatch'
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: "3.9"
     - name: Set up Python (3.10)
       if: github.event_name == 'push'
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: "3.10"
     - name: Set up Python (3.11)
       if: github.event_name == 'schedule'
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: "3.11"
     - name: Build pytket
diff --git a/.github/workflows/build_libs.yml b/.github/workflows/build_libs.yml
index 23153790a3..0430bfd22c 100644
--- a/.github/workflows/build_libs.yml
+++ b/.github/workflows/build_libs.yml
@@ -64,7 +64,7 @@ jobs:
           [IO.File]::WriteAllText($f, $normalized_file)
         }
     - name: Set up Python 3.10
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: '3.10'
     - name: Install conan
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 314034598f..ae68a0fd58 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -12,7 +12,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Set up Python 3.x
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: '3.x'
     - name: Install black and pylint
diff --git a/.github/workflows/packages.yml b/.github/workflows/packages.yml
index f2d5cf4061..55f1c56cbe 100644
--- a/.github/workflows/packages.yml
+++ b/.github/workflows/packages.yml
@@ -25,7 +25,7 @@ jobs:
 
     - name: Select Python 3.10
       # otherwise turtlebrowser/get-conan@v1.2 fails on macos-12
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: '3.10'
 
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index ef92819e26..c3de51c791 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -83,7 +83,7 @@ jobs:
         fetch-depth: '0'
     - run: git fetch --depth=1 origin +refs/tags/*:refs/tags/*
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install conan
@@ -126,7 +126,7 @@ jobs:
     - run: git fetch --depth=1 origin +refs/tags/*:refs/tags/*
     - name: Set up Python ${{ matrix.python-version }}
       if: matrix.python-version != '3.9'
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
     - name: Set up Python 3.9
@@ -184,7 +184,7 @@ jobs:
     - name: Build tket
       run: conan create tket --user tket --channel stable --build=missing -o boost/*:header_only=True -o tklog/*:shared=True -o tket/*:shared=True -tf `"`"
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
     - name: Build wheel
@@ -208,7 +208,7 @@ jobs:
         python3-version: ['9', '10', '11']
     steps:
       - name: Set up Python 3.${{ matrix.python3-version }}
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: "3.${{ matrix.python3-version }}"
       - name: Download wheels
@@ -273,7 +273,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
     - name: Download wheels
@@ -303,7 +303,7 @@ jobs:
     steps:
     - name: Set up Python ${{ matrix.python-version }}
       if: matrix.python-version != '3.9'
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
     - name: Set up Python 3.9
@@ -335,7 +335,7 @@ jobs:
         python-version: ['3.9', '3.10', '3.11']
     steps:
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
     - name: Download wheel
@@ -385,7 +385,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Set up Python 3.10
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: '3.10'
     - name: Download wheels
diff --git a/.github/workflows/test_libs.yml b/.github/workflows/test_libs.yml
index 80e7907877..b5ec34c9bc 100644
--- a/.github/workflows/test_libs.yml
+++ b/.github/workflows/test_libs.yml
@@ -69,7 +69,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Set up Python 3.10
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: '3.10'
     - name: Install conan
diff --git a/.github/workflows/test_libs_all.yml b/.github/workflows/test_libs_all.yml
index 5063fa2a23..6f95f00703 100644
--- a/.github/workflows/test_libs_all.yml
+++ b/.github/workflows/test_libs_all.yml
@@ -16,7 +16,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Set up Python 3.10
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: '3.10'
     - name: Install conan