diff --git a/.github/workflows/actionlint.yml b/.github/workflows/actionlint.yml
index 29bc256e80b..16a13e5ef92 100644
--- a/.github/workflows/actionlint.yml
+++ b/.github/workflows/actionlint.yml
@@ -6,7 +6,7 @@ jobs:
     runs-on: ubuntu-latest
     name: Check all workflow files
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Download actionlint
         id: get_actionlint
         run: bash <(curl https://raw.githubusercontent.com/rhysd/actionlint/main/scripts/download-actionlint.bash)
diff --git a/.github/workflows/annotate_cpp.yml b/.github/workflows/annotate_cpp.yml
index 90150ac31ad..ff06d5ef6a9 100644
--- a/.github/workflows/annotate_cpp.yml
+++ b/.github/workflows/annotate_cpp.yml
@@ -15,7 +15,7 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: -1
 
diff --git a/.github/workflows/annotate_python.yml b/.github/workflows/annotate_python.yml
index 1f8549fe8f7..51ca2bdeea8 100644
--- a/.github/workflows/annotate_python.yml
+++ b/.github/workflows/annotate_python.yml
@@ -10,7 +10,7 @@ jobs:
   annotate-python-linting:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: -1
       - name: Setup Python
diff --git a/.github/workflows/build-wheels-linux.yml b/.github/workflows/build-wheels-linux.yml
index 1df878f199a..e2d800739b0 100644
--- a/.github/workflows/build-wheels-linux.yml
+++ b/.github/workflows/build-wheels-linux.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
 
diff --git a/.github/workflows/build-wheels-macos.yml b/.github/workflows/build-wheels-macos.yml
index 32a99cbcf1c..4aabfce06b1 100644
--- a/.github/workflows/build-wheels-macos.yml
+++ b/.github/workflows/build-wheels-macos.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: macos-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
 
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 3a0f78bbdfe..87931207b9f 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -29,7 +29,7 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Install Ubuntu dependencies
       if: matrix.os == 'ubuntu-latest'
@@ -150,7 +150,7 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
 
diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index 239c757c534..17252f1b2e0 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -23,7 +23,7 @@ jobs:
       matrix:
         test-type: ['integration-tests', 'unit-tests', 'gui-tests']
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
         submodules: true
diff --git a/.github/workflows/doctest.yml b/.github/workflows/doctest.yml
index 704a13df41b..1bb29c70392 100644
--- a/.github/workflows/doctest.yml
+++ b/.github/workflows/doctest.yml
@@ -20,7 +20,7 @@ jobs:
     strategy:
       fail-fast: false
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up Python
       uses: actions/setup-python@v4
       id: setup_python
diff --git a/.github/workflows/run_ert_test_data_setups.yml b/.github/workflows/run_ert_test_data_setups.yml
index 01d39fc7efb..187f6ae945b 100644
--- a/.github/workflows/run_ert_test_data_setups.yml
+++ b/.github/workflows/run_ert_test_data_setups.yml
@@ -31,7 +31,7 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
 
diff --git a/.github/workflows/style.yml b/.github/workflows/style.yml
index 3cf0168415b..d05b59a814f 100644
--- a/.github/workflows/style.yml
+++ b/.github/workflows/style.yml
@@ -20,7 +20,7 @@ jobs:
         python-version: ['3.11']
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
 
diff --git a/.github/workflows/test_ert.yml b/.github/workflows/test_ert.yml
index f64c03a83c8..1553a760eb5 100644
--- a/.github/workflows/test_ert.yml
+++ b/.github/workflows/test_ert.yml
@@ -15,7 +15,7 @@ jobs:
     runs-on: ${{ inputs.os }}
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
         submodules: true
diff --git a/.github/workflows/test_semeio.yml b/.github/workflows/test_semeio.yml
index aff64a664e7..63ce2de63b7 100644
--- a/.github/workflows/test_semeio.yml
+++ b/.github/workflows/test_semeio.yml
@@ -19,7 +19,7 @@ jobs:
     strategy:
       fail-fast: true
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
 
diff --git a/.github/workflows/typing.yml b/.github/workflows/typing.yml
index 11860dfe949..a1a87912fd2 100644
--- a/.github/workflows/typing.yml
+++ b/.github/workflows/typing.yml
@@ -20,7 +20,7 @@ jobs:
         python-version: ['3.11']
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0