diff --git a/charts/groombook/templates/_helpers.tpl b/charts/groombook/templates/_helpers.tpl
index 9c97648..93f19ad 100644
--- a/charts/groombook/templates/_helpers.tpl
+++ b/charts/groombook/templates/_helpers.tpl
@@ -119,3 +119,10 @@ uri
 database-url
 {{- end -}}
 {{- end }}
+
+{{/*
+Auth secret name — always use groombook-auth (sealed secret name)
+*/}}
+{{- define "groombook.authSecretName" -}}
+{{- printf "%s" "groombook-auth" }}
+{{- end }}
diff --git a/charts/groombook/templates/api-deployment.yaml b/charts/groombook/templates/api-deployment.yaml
index aaee7b0..6283210 100644
--- a/charts/groombook/templates/api-deployment.yaml
+++ b/charts/groombook/templates/api-deployment.yaml
@@ -50,6 +50,27 @@ spec:
             - name: OIDC_AUDIENCE
               value: {{ .Values.api.env.oidcAudience | quote }}
             {{- end }}
+            {{- if .Values.api.env.internalBaseUrl }}
+            - name: OIDC_INTERNAL_BASE
+              value: {{ .Values.api.env.internalBaseUrl | quote }}
+            {{- end }}
+            - name: BETTER_AUTH_URL
+              value: {{ .Values.api.env.betterAuthUrl | quote }}
+            - name: OIDC_CLIENT_ID
+              valueFrom:
+                secretKeyRef:
+                  name: {{ include "groombook.authSecretName" . }}
+                  key: OIDC_CLIENT_ID
+            - name: OIDC_CLIENT_SECRET
+              valueFrom:
+                secretKeyRef:
+                  name: {{ include "groombook.authSecretName" . }}
+                  key: OIDC_CLIENT_SECRET
+            - name: BETTER_AUTH_SECRET
+              valueFrom:
+                secretKeyRef:
+                  name: {{ include "groombook.authSecretName" . }}
+                  key: BETTER_AUTH_SECRET
             - name: DATABASE_URL
               valueFrom:
                 secretKeyRef:
diff --git a/charts/groombook/values.yaml b/charts/groombook/values.yaml
index 5f888a5..0e85682 100644
--- a/charts/groombook/values.yaml
+++ b/charts/groombook/values.yaml
@@ -18,6 +18,8 @@ api:
     corsOrigin: ""
     oidcIssuer: ""
     oidcAudience: groombook
+    betterAuthUrl: ""
+    internalBaseUrl: ""
     port: "3000"
   service:
     type: ClusterIP