diff --git a/.python-version b/.python-version
index 2419ad5b..4eba2a62 100644
--- a/.python-version
+++ b/.python-version
@@ -1 +1 @@
-3.11.9
+3.13.0
diff --git a/DEPLOY.md b/DEPLOY.md
index 80b7b8cb..4a3eecb0 100644
--- a/DEPLOY.md
+++ b/DEPLOY.md
@@ -84,11 +84,11 @@ Start Command: uvicorn app.main:app --host 0.0.0.0 --port $PORT
 OPENAI_API_KEY=your_openai_api_key_here
 ALPHA_VANTAGE_API_KEY=your_alpha_vantage_key_here
 TRADINGAGENTS_RESULTS_DIR=/opt/render/project/src/results
-PYTHON_VERSION=3.11.9
+PYTHON_VERSION=3.13.0
 ```
 
 > [!IMPORTANT]
-> Render 要求 `PYTHON_VERSION` 必須是完整的版本號（例如 `3.11.9`），不能只是 `3.11`。
+> Render 要求 `PYTHON_VERSION` 必須是完整的版本號（例如 `3.13.0`）。
 
 #### 1.5 選擇免費方案
 - Instance Type: **Free**
diff --git a/backend/Dockerfile b/backend/Dockerfile
index 0acca5d8..d25393be 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -1,5 +1,6 @@
 # Multi-stage build for FastAPI backend
-FROM python:3.11-slim as builder
+# Multi-stage build for FastAPI backend
+FROM python:3.13-slim as builder
 
 # Set working directory
 WORKDIR /app
@@ -17,7 +18,7 @@ RUN pip install --no-cache-dir --upgrade pip && \
     pip install --no-cache-dir -r requirements.txt
 
 # Production stage
-FROM python:3.11-slim
+FROM python:3.13-slim
 
 WORKDIR /app
 
diff --git a/render.yaml b/render.yaml
index 1e25714b..d60be178 100644
--- a/render.yaml
+++ b/render.yaml
@@ -9,7 +9,7 @@ services:
     startCommand: uvicorn app.main:app --host 0.0.0.0 --port $PORT
     envVars:
       - key: PYTHON_VERSION
-        value: 3.11.9
+        value: 3.13.0
       - key: OPENAI_API_KEY
         sync: false
       - key: ALPHA_VANTAGE_API_KEY