diff --git a/Dockerfile b/Dockerfile
index b3446cd..6cb5863 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.8
+FROM python:3.9-slim
 
 ENV TZ Europe/Budapest
 RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone