diff --git a/kubernetes/loculus/templates/loculus-preprocessing-deployment.yaml b/kubernetes/loculus/templates/loculus-preprocessing-deployment.yaml
index a8bbb6ed6..586230243 100644
--- a/kubernetes/loculus/templates/loculus-preprocessing-deployment.yaml
+++ b/kubernetes/loculus/templates/loculus-preprocessing-deployment.yaml
@@ -3,7 +3,10 @@
     "http://host.k3d.internal:8079"
     "http://loculus-backend-service:8079"
 }}
-{{- $keycloakHost := printf "https://authentication-%s" $.Values.host }}
+{{- $keycloakHost := .Values.environment | eq "server" | ternary
+    (printf "https://authentication-%s" $.Values.host)
+    "http://loculus-keycloak-service:8083"
+}}
 {{- if not .Values.disablePreprocessing }}
 {{- range $key, $value := .Values.instances }}
 ---