diff --git a/.github/workflows/check-flake.yml b/.github/workflows/check-flake.yml
index d08c0d3b..7a8f4832 100644
--- a/.github/workflows/check-flake.yml
+++ b/.github/workflows/check-flake.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Harden the runner (Audit all outbound calls)
-        uses: step-security/harden-runner@bf7454d06d71f1098171f2acdf0cd4708d7b5920 # v2.20.0
+        uses: step-security/harden-runner@05e31511f85b41b11d1cf0ef85d0992719546e2c # v2.21.0
         with:
           egress-policy: audit
 
diff --git a/.github/workflows/pr-check-signed-commits.yml b/.github/workflows/pr-check-signed-commits.yml
index 36e64e41..119095f9 100644
--- a/.github/workflows/pr-check-signed-commits.yml
+++ b/.github/workflows/pr-check-signed-commits.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Harden the runner (Audit all outbound calls)
-        uses: step-security/harden-runner@bf7454d06d71f1098171f2acdf0cd4708d7b5920 # v2.20.0
+        uses: step-security/harden-runner@05e31511f85b41b11d1cf0ef85d0992719546e2c # v2.21.0
         with:
           egress-policy: audit
 
diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index a27e4c38..5e512b8e 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Harden the runner (Audit all outbound calls)
-        uses: step-security/harden-runner@bf7454d06d71f1098171f2acdf0cd4708d7b5920 # v2.20.0
+        uses: step-security/harden-runner@05e31511f85b41b11d1cf0ef85d0992719546e2c # v2.21.0
         with:
           egress-policy: audit
 
@@ -44,7 +44,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Harden the runner (Audit all outbound calls)
-        uses: step-security/harden-runner@bf7454d06d71f1098171f2acdf0cd4708d7b5920 # v2.20.0
+        uses: step-security/harden-runner@05e31511f85b41b11d1cf0ef85d0992719546e2c # v2.21.0
         with:
           egress-policy: audit
 
diff --git a/.github/workflows/update-flake-dependencies.yml b/.github/workflows/update-flake-dependencies.yml
index ecc77e84..88066bb8 100644
--- a/.github/workflows/update-flake-dependencies.yml
+++ b/.github/workflows/update-flake-dependencies.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Harden the runner (Audit all outbound calls)
-        uses: step-security/harden-runner@bf7454d06d71f1098171f2acdf0cd4708d7b5920 # v2.20.0
+        uses: step-security/harden-runner@05e31511f85b41b11d1cf0ef85d0992719546e2c # v2.21.0
         with:
           egress-policy: audit