diff --git a/Dockerfile b/Dockerfile
index 0f5e8e2..ef120e7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,8 +3,9 @@ FROM debian:trixie
 ENV DEBIAN_FRONTEND=noninteractive
 
 # 한국 Debian 미러 소스로 변경
-RUN sed -i 's|deb.debian.org|ftp.kr.debian.org|g' /etc/apt/sources.list && \
-    sed -i 's|security.debian.org|ftp.kr.debian.org/debian-security|g' /etc/apt/sources.list
+RUN echo "deb http://ftp.kr.debian.org/debian trixie main" > /etc/apt/sources.list && \
+    echo "deb http://ftp.kr.debian.org/debian trixie-updates main" >> /etc/apt/sources.list && \
+    echo "deb http://ftp.kr.debian.org/debian-security trixie-security main" >> /etc/apt/sources.list
 
 RUN apt-get update