diff --git a/ontime-back/Dockerfile b/ontime-back/Dockerfile
index 4efcb5c..fdc2004 100644
--- a/ontime-back/Dockerfile
+++ b/ontime-back/Dockerfile
@@ -1,7 +1,10 @@
 FROM eclipse-temurin:17-jdk
-RUN microdnf install -y tzdata && \
+RUN apt-get update && \
+    apt-get install -y tzdata && \
     ln -snf /usr/share/zoneinfo/Asia/Seoul /etc/localtime && \
-    echo "Asia/Seoul" > /etc/timezone
+    echo "Asia/Seoul" > /etc/timezone && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/*
 WORKDIR /app
 COPY project.jar app.jar
 ENTRYPOINT ["java", "-jar", "/app/app.jar"]
\ No newline at end of file