diff --git a/.github/workflows/validate-mermaid.yml b/.github/workflows/validate-mermaid.yml
index 016b234..ada6bc8 100644
--- a/.github/workflows/validate-mermaid.yml
+++ b/.github/workflows/validate-mermaid.yml
@@ -31,7 +31,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
-      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
 
       - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
         with:
diff --git a/.github/workflows/validate-research.yml b/.github/workflows/validate-research.yml
index 4aa2f89..8e09301 100644
--- a/.github/workflows/validate-research.yml
+++ b/.github/workflows/validate-research.yml
@@ -43,7 +43,7 @@ jobs:
         os: [ubuntu-latest, windows-latest]
         node: [22, 26]
     steps:
-      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
 
       - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
         with:
@@ -65,7 +65,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest]
     steps:
-      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
 
       - uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2
         with: