diff --git a/.github/workflows/approve-project.yml b/.github/workflows/approve-project.yml
index 4a953cf..165a2c7 100644
--- a/.github/workflows/approve-project.yml
+++ b/.github/workflows/approve-project.yml
@@ -17,7 +17,7 @@ jobs:
       cancel-in-progress: false
     steps:
       - name: Checkout
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5  # v4.3.1
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10  # v6.0.3
 
       - name: Extract project data and update registry
         id: extract
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 786573e..86caa40 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5  # v4.3.1
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10  # v6.0.3
 
       - name: Setup Node.js
         uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020  # v4.4.0
diff --git a/.github/workflows/escalation-vote.yml b/.github/workflows/escalation-vote.yml
index 9bb4977..e4abfbf 100644
--- a/.github/workflows/escalation-vote.yml
+++ b/.github/workflows/escalation-vote.yml
@@ -19,7 +19,7 @@ jobs:
       startsWith(github.event.comment.body, '/vote no-escalate')
     steps:
       - name: Checkout
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5  # v4.3.1
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10  # v6.0.3
 
       - name: Tally escalation votes
         uses: actions/github-script@f28e40c7f34bde8b3046d885e986cb6290c5673b  # v7.1.0
diff --git a/.github/workflows/governance-agent.yml b/.github/workflows/governance-agent.yml
index f14ddb5..65de7ac 100644
--- a/.github/workflows/governance-agent.yml
+++ b/.github/workflows/governance-agent.yml
@@ -40,7 +40,7 @@ jobs:
       cancel-in-progress: true
     steps:
       - name: Checkout
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5  # v4.3.1
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10  # v6.0.3
 
       - name: Generate case brief
         uses: actions/github-script@f28e40c7f34bde8b3046d885e986cb6290c5673b  # v7.1.0
@@ -415,7 +415,7 @@ jobs:
       cancel-in-progress: false
     steps:
       - name: Checkout
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5  # v4.3.1
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10  # v6.0.3
 
       - name: Route and process command
         uses: actions/github-script@f28e40c7f34bde8b3046d885e986cb6290c5673b  # v7.1.0
@@ -895,7 +895,7 @@ jobs:
       github.event.schedule == '0 9 * * 1'
     steps:
       - name: Checkout
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5  # v4.3.1
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10  # v6.0.3
 
       - name: Monitor approved projects
         uses: actions/github-script@f28e40c7f34bde8b3046d885e986cb6290c5673b  # v7.1.0
@@ -1148,7 +1148,7 @@ jobs:
       github.event.schedule == '0 0 1 * *'
     steps:
       - name: Checkout
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5  # v4.3.1
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10  # v6.0.3
 
       - name: Setup Node
         uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020  # v4.4.0
diff --git a/.github/workflows/retraction.yml b/.github/workflows/retraction.yml
index 49fb370..14c081e 100644
--- a/.github/workflows/retraction.yml
+++ b/.github/workflows/retraction.yml
@@ -107,7 +107,7 @@ jobs:
       cancel-in-progress: false
     steps:
       - name: Checkout
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5  # v4.3.1
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10  # v6.0.3
 
       - name: Tally retraction votes
         id: tally
diff --git a/.github/workflows/validation-vote.yml b/.github/workflows/validation-vote.yml
index 7fa020b..207b362 100644
--- a/.github/workflows/validation-vote.yml
+++ b/.github/workflows/validation-vote.yml
@@ -21,7 +21,7 @@ jobs:
       startsWith(github.event.comment.body, '/vote approve-with-conditions')
     steps:
       - name: Checkout
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5  # v4.3.1
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10  # v6.0.3
 
       - name: Tally validation votes
         uses: actions/github-script@f28e40c7f34bde8b3046d885e986cb6290c5673b  # v7.1.0