diff --git a/.gitlab/ci_scripts/install_zerossl_issuer.sh b/.gitlab/ci_scripts/install_zerossl_issuer.sh
index 529af5e3611c48495bd6dacecdd3dad810a2b62b..8d026829eb1ca2cb0e85a2021865f5a026d3cf3e 100755
--- a/.gitlab/ci_scripts/install_zerossl_issuer.sh
+++ b/.gitlab/ci_scripts/install_zerossl_issuer.sh
@@ -13,7 +13,7 @@ b64secret=$(echo -n "${ZEROSSL_EAB_HMAC_KEY}" | base64 -w0)
 b64tlskey=$(echo -n "${ZEROSSL_TLS_KEY}" | base64 -w0)
 
 # Wait until cert-manager is ready
-"$(dirname "$0")/retry_cmd_until_success.sh" 30 10 "flux get kustomization --status-selector ready=true --no-header | grep '^core'"
+"$(dirname "$0")/retry_cmd_until_success.sh" 30 10 "flux get kustomization --status-selector ready=true --no-header | grep 'cert-manager'"
 
 # Add ZeroSSL ClusterIssuer
 kubectl apply -n cert-manager -f - <<EOF