diff --git a/go-services/docker-compose.go.yml b/go-services/docker-compose.go.yml
index bc7bc3ba..a0667609 100644
--- a/go-services/docker-compose.go.yml
+++ b/go-services/docker-compose.go.yml
@@ -30,7 +30,10 @@ services:
       PORT: "8770"
       # Read-only use of the same dereth TimescaleDB the Python tracker writes.
       DATABASE_URL: "postgresql://postgres:${POSTGRES_PASSWORD}@db:5432/dereth"
-      INVENTORY_SERVICE_URL: "http://inventory-service:8000"
+      # Point at the Go inventory service so the /go/ read stack is fully Go
+      # end-to-end (browser -> Go tracker -> Go inventory -> read-only prod DBs).
+      # inventory-go is read-only against the production inventory_db.
+      INVENTORY_SERVICE_URL: "http://inventory-go:8772"
       # Same signing key as the Python tracker so the same login cookie verifies
       # on both during the parallel run.
       SECRET_KEY: "${SECRET_KEY}"