diff --git a/backend/Dockerfile b/backend/Dockerfile
index 52c603c..52da435 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -1,5 +1,5 @@
 # --- Builder stage: compiles native extensions (psycopg2, cryptography) ---
-FROM python:3.11-slim AS builder
+FROM python:3.14-slim AS builder
 
 ENV PYTHONDONTWRITEBYTECODE=1
 ENV PYTHONUNBUFFERED=1
@@ -16,7 +16,7 @@ RUN pip install --no-cache-dir --upgrade pip && \
     pip install --no-cache-dir --prefix=/install -r requirements.txt
 
 # --- Runtime stage: no compiler toolchain, runs as a non-root user ---
-FROM python:3.11-slim
+FROM python:3.14-slim
 
 ENV PYTHONDONTWRITEBYTECODE=1
 ENV PYTHONUNBUFFERED=1