diff --git a/.github/workflows/cibuild.yml b/.github/workflows/cibuild.yml
index ef441be..3a896bc 100644
--- a/.github/workflows/cibuild.yml
+++ b/.github/workflows/cibuild.yml
@@ -27,7 +27,7 @@ jobs:
       BUNDLE_PATH: vendor/bundle
     steps:
     - name: Harden Runner
-      uses: step-security/harden-runner@bf7454d06d71f1098171f2acdf0cd4708d7b5920 # v2.20.0
+      uses: step-security/harden-runner@05e31511f85b41b11d1cf0ef85d0992719546e2c # v2.21.0
       with:
         egress-policy: audit # TODO: change to 'egress-policy: block' after couple of runs