diff --git a/auth/Dockerfile b/auth/Dockerfile
index 4a8eabd..7194c35 100644
--- a/auth/Dockerfile
+++ b/auth/Dockerfile
@@ -1,5 +1,5 @@
 # Base image
-FROM python:3.9-slim
+FROM python:3.9-slim:alpine
 
 # Set working directory
 WORKDIR /app