diff --git a/Dockerfile b/Dockerfile
index 8b44610..fd0a788 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.8
+FROM python:3-slim
 
 ENV PYTHONUNBUFFERED 1
 ENV SPACEONE_PORT 50051
@@ -6,6 +6,8 @@ ENV SERVER_TYPE grpc
 ENV PKG_DIR /tmp/pkg
 ENV SRC_DIR /tmp/src
 
+RUN apt update && apt upgrade -y
+
 COPY pkg/*.txt ${PKG_DIR}/
 RUN pip install --upgrade pip && \
     pip install --upgrade -r ${PKG_DIR}/pip_requirements.txt && \