diff --git a/README.md b/README.md
index 7260bca..c985488 100644
--- a/README.md
+++ b/README.md
@@ -25,6 +25,7 @@ Create a `.env` file with the following variables:
 | :--- | :--- | :--- | :--- |
 | `GITEA_TOKEN` | **Yes** | A Gitea Access Token. Required permissions: `repository` (Read), `issue` (Read and Write). | |
 | `GITEA_API_URL` | No | Full URL to your Gitea API (e.g., `http://gitea:3000/api/v1`). | |
+| `PORT` | No | Host port to expose the webhook server on. | `3000` |
 | `OPENAI_API_KEY` | **Yes** | API Key for your LLM provider. Use `dummy` for local models if no auth needed. | |
 | `OPENAI_BASE_URL` | No | Base URL for the LLM API. Set this for Ollama/vLLM (e.g. `http://host.docker.internal:11434/v1/`). | `https://api.openai.com/v1/` |
 | `LLM_MODEL` | No | The model name to request (e.g. `gpt-4o`, `llama3.1`). | `gpt-4o` |
diff --git a/compose.yaml b/compose.yaml
index ddb0e99..73cdf86 100644
--- a/compose.yaml
+++ b/compose.yaml
@@ -5,7 +5,7 @@ services:
     container_name: gitea-ai-webhook
     restart: always
     ports:
-      - "3000:3000"
+      - "${PORT:-3000}:3000"
     environment:
       - GITEA_TOKEN=${GITEA_TOKEN}
       # LLM Configuration