diff --git a/.env.example b/.env.example
index 5dafbd0..a16a424 100644
--- a/.env.example
+++ b/.env.example
@@ -5,7 +5,6 @@ PORT=4000
 # http://localhost:4000 instead.
 PUBLIC_BASE_URL=https://api.altdock.app.amania.jp
 WEB_ORIGIN=https://altdock.app.amania.jp
-NEXT_PUBLIC_API_BASE_URL=https://api.altdock.app.amania.jp
 NEXT_PUBLIC_AUTH_MODE=demo
 # Vite dev server Host allow-list (comma-separated, or * for any host).
 # On Coolify set this to your public domain, e.g. altdock.app.amania.jp
diff --git a/app/lib/dashboard.ts b/app/lib/dashboard.ts
index fe5ae45..b185e92 100644
--- a/app/lib/dashboard.ts
+++ b/app/lib/dashboard.ts
@@ -31,7 +31,9 @@ export type Notice = {
 
 export type Visibility = SourceRecord["visibility"];
 
-export const API_BASE = process.env.NEXT_PUBLIC_API_BASE_URL || "http://localhost:4000";
+// Single-user deployment: hard-code the public API origin. The API is served
+// at api.altdock.app.amania.jp; there is no per-environment fallback anymore.
+export const API_BASE = "https://api.altdock.app.amania.jp";
 export const AUTH_MODE = process.env.NEXT_PUBLIC_AUTH_MODE || "demo";
 export const DEMO_HEADERS = { "x-demo-user": "demo@altdock.local" };
 
@@ -102,4 +104,3 @@ export function flattenApps(dashboard: DashboardData) {
 export function flattenReleases(dashboard: DashboardData) {
   return dashboard.sources.flatMap((entry) => entry.releases.map((release) => ({ release, source: entry.source, app: entry.apps.find((app) => app.id === release.appId) })));
 }
-
diff --git a/app/sources/[slug]/PublicSourceView.tsx b/app/sources/[slug]/PublicSourceView.tsx
index 647ddfc..fca6aa5 100644
--- a/app/sources/[slug]/PublicSourceView.tsx
+++ b/app/sources/[slug]/PublicSourceView.tsx
@@ -12,7 +12,8 @@ type SourceDocument = {
   apps: Array<{ name: string; bundleIdentifier: string; developerName: string; subtitle?: string; localizedDescription: string; iconURL?: string; category: string; versions: Array<{ version: string; buildVersion: string; date: string; downloadURL: string; size: number }> }>;
 };
 
-const API_BASE = process.env.NEXT_PUBLIC_API_BASE_URL || "http://localhost:4000";
+// Single-user deployment: hard-code the public API origin.
+const API_BASE = "https://api.altdock.app.amania.jp";
 
 function formatBytes(value: number) {
   if (!value) return "0 B";
diff --git a/apps/api/src/config.ts b/apps/api/src/config.ts
index a3061b2..387c018 100644
--- a/apps/api/src/config.ts
+++ b/apps/api/src/config.ts
@@ -14,8 +14,8 @@ const schema = z.object({
   NODE_ENV: z.enum(["development", "test", "production"]).default("development"),
   HOST: z.string().default("0.0.0.0"),
   PORT: numberFromEnv.default(4000),
-  PUBLIC_BASE_URL: z.string().url().default("http://localhost:4000"),
-  WEB_ORIGIN: z.string().url().default("http://localhost:3001"),
+  PUBLIC_BASE_URL: z.string().url().default("https://api.altdock.app.amania.jp"),
+  WEB_ORIGIN: z.string().url().default("https://altdock.app.amania.jp"),
   DATABASE_URL: z.string().optional(),
   STORAGE_MODE: z.enum(["local", "s3"]).default("local"),
   LOCAL_STORAGE_DIR: z.string().default(".data/storage"),
diff --git a/docker-compose.yml b/docker-compose.yml
index 5a8298d..8effb52 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -113,7 +113,7 @@ services:
     # vinext uses --hostname/--port (not vite's --host) to bind the dev server.
     command: npm run dev -- --hostname 0.0.0.0 --port 3001
     environment:
-      NEXT_PUBLIC_API_BASE_URL: ${NEXT_PUBLIC_API_BASE_URL:-https://api.altdock.app.amania.jp}
+      # API origin is hard-coded in app/lib/dashboard.ts (single-user deploy).
       NEXT_PUBLIC_AUTH_MODE: ${AUTH_MODE:-demo}
       # Hosts allowed to reach the dev server (comma-separated, or * for any).
       VITE_ALLOWED_HOSTS: ${VITE_ALLOWED_HOSTS:-altdock.app.amania.jp}