diff --git a/.github/workflows/generate-gif.yml b/.github/workflows/generate-gif.yml
index 2f5a26c..0ee6480 100644
--- a/.github/workflows/generate-gif.yml
+++ b/.github/workflows/generate-gif.yml
@@ -8,7 +8,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Install ImageMagick
         run: sudo apt-get install imagemagick
diff --git a/.github/workflows/issue-as-diagram.yml b/.github/workflows/issue-as-diagram.yml
index 50984ce..37d59f4 100644
--- a/.github/workflows/issue-as-diagram.yml
+++ b/.github/workflows/issue-as-diagram.yml
@@ -10,7 +10,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Create new branch
         id: create-branch
diff --git a/.github/workflows/render-md-mermaid.yml b/.github/workflows/render-md-mermaid.yml
index 59781d0..654ce1e 100644
--- a/.github/workflows/render-md-mermaid.yml
+++ b/.github/workflows/render-md-mermaid.yml
@@ -8,7 +8,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Render images for every Mermaid diagram in all Markdown files (*.md) in the repo
         uses: nielsvaneck/render-md-mermaid@v3