diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 3331b8792..1d1f2c121 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -9,9 +9,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up Python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: 3.11
         
diff --git a/.github/workflows/downstream_test.yml b/.github/workflows/downstream_test.yml
index bd582f99e..2545875a1 100644
--- a/.github/workflows/downstream_test.yml
+++ b/.github/workflows/downstream_test.yml
@@ -10,9 +10,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up Python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: 3.9
     - name: Install dependencies
diff --git a/.github/workflows/full_test.yml b/.github/workflows/full_test.yml
index c7615261b..3eda9b3f0 100644
--- a/.github/workflows/full_test.yml
+++ b/.github/workflows/full_test.yml
@@ -20,13 +20,13 @@ jobs:
         python-version: [3.9, "3.12"]
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: chartboost/ruff-action@v1 # Fail fast if there are any linting errors
       with:
         version: 0.6.2 # consistent with pyproject.toml ?
         src: mikeio # ignore notebooks
     - 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 dependencies
diff --git a/.github/workflows/legacy_test.yml b/.github/workflows/legacy_test.yml
index df10ac375..d8eece050 100644
--- a/.github/workflows/legacy_test.yml
+++ b/.github/workflows/legacy_test.yml
@@ -13,9 +13,9 @@ jobs:
         runs-on: ubuntu-latest
 
         steps:
-        - uses: actions/checkout@v3
+        - uses: actions/checkout@v4
         - name: Set up Python
-          uses: actions/setup-python@v4
+          uses: actions/setup-python@v5
           with:
             python-version: 3.9
               
diff --git a/.github/workflows/notebooks_test.yml b/.github/workflows/notebooks_test.yml
index c3d37128c..ff6ee147b 100644
--- a/.github/workflows/notebooks_test.yml
+++ b/.github/workflows/notebooks_test.yml
@@ -14,9 +14,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up Python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: '3.9'    
     - name: Install mikeio
diff --git a/.github/workflows/perf_test.yml b/.github/workflows/perf_test.yml
index 1b39e73cf..9bd61290e 100644
--- a/.github/workflows/perf_test.yml
+++ b/.github/workflows/perf_test.yml
@@ -17,9 +17,9 @@ jobs:
         python-version: ["3.10"]
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - 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 dependencies
diff --git a/.github/workflows/python-publish.yml b/.github/workflows/python-publish.yml
index c6b0174ba..e011f10ad 100644
--- a/.github/workflows/python-publish.yml
+++ b/.github/workflows/python-publish.yml
@@ -18,9 +18,9 @@ jobs:
 
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up Python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: '3.10'
     - name: Install dependencies