diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index cd4f58b4..168cc237 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -38,7 +38,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
diff --git a/.github/workflows/docker-build.yml b/.github/workflows/docker-build.yml
index 7cb5fd31..85122054 100644
--- a/.github/workflows/docker-build.yml
+++ b/.github/workflows/docker-build.yml
@@ -33,7 +33,7 @@ jobs:
     steps:
       # https://github.com/marketplace/actions/checkout
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set up JDK 17
         uses: actions/setup-java@v3
diff --git a/.github/workflows/gradle.yml b/.github/workflows/gradle.yml
index 597cbbfa..b8db63fa 100644
--- a/.github/workflows/gradle.yml
+++ b/.github/workflows/gradle.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up JDK 17
       uses: actions/setup-java@v3
       with:
diff --git a/.github/workflows/release-upload.yml b/.github/workflows/release-upload.yml
index a70cec68..05935c8b 100644
--- a/.github/workflows/release-upload.yml
+++ b/.github/workflows/release-upload.yml
@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: shared-outputs
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up JDK 17
         uses: actions/setup-java@v3
         with:
@@ -58,7 +58,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: shared-outputs
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           repository: 'wildmountainfarms/solarthing-docs'
       - uses: actions/setup-python@v4
diff --git a/.github/workflows/spotless.yml b/.github/workflows/spotless.yml
index b417cc56..d57bc711 100644
--- a/.github/workflows/spotless.yml
+++ b/.github/workflows/spotless.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Set up JDK 17
       uses: actions/setup-java@v3
       with: