diff --git a/action.yml b/action.yml
index 856a988c..8a08b771 100644
--- a/action.yml
+++ b/action.yml
@@ -157,7 +157,7 @@ outputs:
 
 runs:
   using: 'docker'
-  image: 'docker://ghcr.io/step-security/publish-unit-test-result-action::v2.20.3' #v2.20.3
+  image: 'docker://ghcr.io/step-security/publish-unit-test-result-action@sha256:56c71d48fc458bbded0b93202c4f9bbfba436a6ea819d94cd961c8fb1627e751' #v2.20.3
 
 branding:
   icon: 'check-circle'