diff --git a/nowchess/eu-central-1-staging/kustomization.yaml b/nowchess/eu-central-1-staging/kustomization.yaml
index c9dc0f5..9402598 100644
--- a/nowchess/eu-central-1-staging/kustomization.yaml
+++ b/nowchess/eu-central-1-staging/kustomization.yaml
@@ -47,7 +47,7 @@ images:
 - name: ghcr.io/now-chess/now-chess-systems/coordinator
   newTag: latest
 - name: ghcr.io/now-chess/now-chess-systems/core
-  newTag: latest
+  newTag: 0.21.0
 - name: ghcr.io/now-chess/now-chess-systems/io
   newTag: latest
 - name: ghcr.io/now-chess/now-chess-systems/official-bots