diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3c6fe55..8cac10c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## 1.2.1 - 2026-09-15
+
+- Set the Docker Compose container host binding to `0.0.0.0` so Docker's localhost port mapping can reach h-player while keeping the host publish on `127.0.0.1`.
+
 ## 1.2.0 - 2026-09-15
 
 - Renamed the project and user-facing app identity to `h-player`.
diff --git a/README.md b/README.md
index f71de30..17e3aab 100644
--- a/README.md
+++ b/README.md
@@ -25,7 +25,7 @@ docker compose up --build
 
 Open http://localhost:3000.
 
-The app binds to `127.0.0.1` by default, so it is only reachable from the same machine unless you explicitly set `HOST`. The compose file publishes the container on `127.0.0.1:3000`. Your library is mounted read-only, while metadata and generated thumbnails are saved in `/data` inside the container.
+The app binds to `127.0.0.1` by default when run directly. Docker Compose sets `HOST=0.0.0.0` inside the container so Docker's port forward can reach the app, while still publishing the host port only on `127.0.0.1:3000`. Your library is mounted read-only, while metadata and generated thumbnails are saved in `/data` inside the container.
 
 The included compose file keeps the existing `/mnt/ssd2/docker_data/h-play` host data path so renaming the app to h-player does not hide metadata from an already-running instance. Move that directory yourself before changing the mount path.
 
diff --git a/VERSION b/VERSION
index 26aaba0..6085e94 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.2.0
+1.2.1
diff --git a/docker-compose.yml b/docker-compose.yml
index e1dba03..895a90c 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -5,6 +5,7 @@ services:
     ports:
       - "127.0.0.1:3000:3000"
     environment:
+      HOST: 0.0.0.0
       LIBRARY_DIR: /library
       DATA_DIR: /data
       # Uncomment these to require browser Basic Auth.
diff --git a/package.json b/package.json
index ad051e2..9ba07d2 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "h-player",
-  "version": "1.2.0",
+  "version": "1.2.1",
   "private": true,
   "description": "A small private web app for browsing a folder-based video collection.",
   "scripts": {