diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 948e08f..0895bc5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -38,7 +38,7 @@ jobs:
         # produce green tests on every PR.
         jdk: ["21", "25"]
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           fetch-depth: 1
 
@@ -139,7 +139,7 @@ jobs:
     permissions:
       contents: read
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - uses: actions/setup-java@v5
         with:
           distribution: temurin
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index e02ec2f..15e8ec3 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -27,7 +27,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
 
       - name: Initialize CodeQL
         uses: github/codeql-action/init@v4
diff --git a/.github/workflows/diagrams.yml b/.github/workflows/diagrams.yml
index d7579e6..32ab1dd 100644
--- a/.github/workflows/diagrams.yml
+++ b/.github/workflows/diagrams.yml
@@ -15,7 +15,7 @@ jobs:
     name: re-render and diff
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - name: Install Graphviz
         run: sudo apt-get update && sudo apt-get install -y graphviz
diff --git a/.github/workflows/pitest-nightly.yml b/.github/workflows/pitest-nightly.yml
index 9bb3930..17713c2 100644
--- a/.github/workflows/pitest-nightly.yml
+++ b/.github/workflows/pitest-nightly.yml
@@ -15,7 +15,7 @@ jobs:
       matrix:
         module: [arcp-core, arcp-runtime]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - uses: actions/setup-java@v4
         with:
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 8120d97..08935a1 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -22,7 +22,7 @@ jobs:
     permissions:
       contents: write  # for tagging
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           fetch-depth: 0