diff --git a/hardening_manifest.yaml b/hardening_manifest.yaml
index c16231908553840e13674dd113e05209e3e342fa..6b21b6822ba737db7db587174cc0e7287b3a9821 100644
--- a/hardening_manifest.yaml
+++ b/hardening_manifest.yaml
@@ -14,7 +14,7 @@ tags:
 # Build args passed to Dockerfile ARGs
 args:
   BASE_IMAGE: "opensource/nginx/nginx"
-  BASE_TAG: "1.20.1"
+  BASE_TAG: "1.21.1"
 
 # Docker image labels
 labels: