diff --git a/Dockerfile b/Dockerfile
index 01e04de..a27f0c9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3-alpine
+FROM python:3.21.0
 WORKDIR /service
 COPY requirements.txt .
 RUN pip install -r requirements.txt