diff --git a/.github/workflows/bootstrap.yaml b/.github/workflows/bootstrap.yaml
index 2c2ab17..b9258f8 100644
--- a/.github/workflows/bootstrap.yaml
+++ b/.github/workflows/bootstrap.yaml
@@ -61,7 +61,7 @@ jobs:
       packages: write # push the OCI manifest artifact to GHCR
     steps:
       - name: 🛡️ Harden runner
-        uses: step-security/harden-runner@b09bb98e06d4d774595224525879c09bc6e98c40 # v2.20.1
+        uses: step-security/harden-runner@05e31511f85b41b11d1cf0ef85d0992719546e2c # v2.21.0
         with:
           egress-policy: audit
 
diff --git a/.github/workflows/cd.yaml b/.github/workflows/cd.yaml
index 0f38b34..37c1c77 100644
--- a/.github/workflows/cd.yaml
+++ b/.github/workflows/cd.yaml
@@ -29,7 +29,7 @@ jobs:
       attestations: write # write SBOM + SLSA provenance attestations
     steps:
       - name: 🛡️ Harden runner
-        uses: step-security/harden-runner@b09bb98e06d4d774595224525879c09bc6e98c40 # v2.20.1
+        uses: step-security/harden-runner@05e31511f85b41b11d1cf0ef85d0992719546e2c # v2.21.0
         with:
           egress-policy: audit
 
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 10438e0..8ac11be 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -21,7 +21,7 @@ jobs:
       k8s: ${{ steps.filter.outputs.k8s }}
     steps:
       - name: 🛡️ Harden runner
-        uses: step-security/harden-runner@b09bb98e06d4d774595224525879c09bc6e98c40 # v2.20.1
+        uses: step-security/harden-runner@05e31511f85b41b11d1cf0ef85d0992719546e2c # v2.21.0
         with:
           egress-policy: audit
 
@@ -64,7 +64,7 @@ jobs:
       contents: read # checkout repository
     steps:
       - name: 🛡️ Harden runner
-        uses: step-security/harden-runner@b09bb98e06d4d774595224525879c09bc6e98c40 # v2.20.1
+        uses: step-security/harden-runner@05e31511f85b41b11d1cf0ef85d0992719546e2c # v2.21.0
         with:
           egress-policy: audit
 
@@ -89,7 +89,7 @@ jobs:
       contents: read # checkout repository
     steps:
       - name: 🛡️ Harden runner
-        uses: step-security/harden-runner@b09bb98e06d4d774595224525879c09bc6e98c40 # v2.20.1
+        uses: step-security/harden-runner@05e31511f85b41b11d1cf0ef85d0992719546e2c # v2.21.0
         with:
           egress-policy: audit
 
@@ -158,7 +158,7 @@ jobs:
       id-token: write # mint OIDC token for cosign keyless signing (Fulcio + Rekor)
     steps:
       - name: 🛡️ Harden runner
-        uses: step-security/harden-runner@b09bb98e06d4d774595224525879c09bc6e98c40 # v2.20.1
+        uses: step-security/harden-runner@05e31511f85b41b11d1cf0ef85d0992719546e2c # v2.21.0
         with:
           egress-policy: audit
 
diff --git a/.github/workflows/copilot-setup-steps.yml b/.github/workflows/copilot-setup-steps.yml
index 8da388d..6035860 100644
--- a/.github/workflows/copilot-setup-steps.yml
+++ b/.github/workflows/copilot-setup-steps.yml
@@ -20,7 +20,7 @@ jobs:
 
     steps:
       - name: 🛡️ Harden runner
-        uses: step-security/harden-runner@b09bb98e06d4d774595224525879c09bc6e98c40 # v2.20.1
+        uses: step-security/harden-runner@05e31511f85b41b11d1cf0ef85d0992719546e2c # v2.21.0
         with:
           egress-policy: audit
 
diff --git a/.github/workflows/validate-scaffold.yaml b/.github/workflows/validate-scaffold.yaml
index 6143a24..01f246f 100644
--- a/.github/workflows/validate-scaffold.yaml
+++ b/.github/workflows/validate-scaffold.yaml
@@ -31,7 +31,7 @@ jobs:
       contents: read # checkout
     steps:
       - name: 🛡️ Harden runner
-        uses: step-security/harden-runner@b09bb98e06d4d774595224525879c09bc6e98c40 # v2.20.1
+        uses: step-security/harden-runner@05e31511f85b41b11d1cf0ef85d0992719546e2c # v2.21.0
         with:
           egress-policy: audit