diff --git a/backend/Dockerfile b/backend/Dockerfile
index b3dd04d..1363cc7 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -1,11 +1,8 @@
-FROM node:14
+FROM node:18
 
 WORKDIR /usr/src/app
 
-# Fix Debian Buster repositories (EOL)
-RUN sed -i 's/deb.debian.org/archive.debian.org/g' /etc/apt/sources.list && \
-    sed -i 's/security.debian.org/archive.debian.org/g' /etc/apt/sources.list && \
-    sed -i '/stretch-updates/d' /etc/apt/sources.list
+# Note: Node 18 uses Debian Bullseye which is still supported, so no archive.debian.org workaround needed
 
 # Install sqlite3 CLI
 RUN apt-get update && apt-get install -y sqlite3 && rm -rf /var/lib/apt/lists/*