diff --git a/Dockerfile b/Dockerfile
index c327af9..12c8ee8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -19,13 +19,15 @@ ENV HTTPS_PROXY=${https_proxy}
 
 # =========================================================
 # System dependencies & Extensions
-# Redirect APT Repositories to Local Nexus (10.15.39.186)
+# Timpa total sources.list dan bypass proxy eksternal
 # =========================================================
 
-RUN sed -i 's|http://deb.debian.org/debian|http://10.15.39.186:8081/repository/debian-proxy/|g' /etc/apt/sources.list \
-    && sed -i 's|http://security.debian.org/debian-security|http://10.15.39.186:8081/repository/debian-security-proxy/|g' /etc/apt/sources.list \
-    && apt-get update -o Acquire::Retries=5 \
-    && apt-get install -y --no-install-recommends --fix-missing \
+RUN echo "deb http://10.15.39.186:8081/repository/debian-proxy/ bullseye main" > /etc/apt/sources.list \
+    && echo "deb http://10.15.39.186:8081/repository/debian-proxy/ bullseye-updates main" >> /etc/apt/sources.list \
+    && echo "deb http://10.15.39.186:8081/repository/debian-security-proxy/ bullseye-security main" >> /etc/apt/sources.list \
+    && rm -rf /etc/apt/sources.list.d/* \
+    && env -u http_proxy -u https_proxy -u HTTP_PROXY -u HTTPS_PROXY apt-get update \
+    && env -u http_proxy -u https_proxy -u HTTP_PROXY -u HTTPS_PROXY apt-get install -y --no-install-recommends \
         nginx \
         vim \
         wget \
@@ -36,14 +38,8 @@ RUN sed -i 's|http://deb.debian.org/debian|http://10.15.39.186:8081/repository/d
         libaio1 \
         libaio-dev \
         unzip \
-    && docker-php-ext-configure gd \
-        --with-freetype \
-        --with-jpeg \
-    && docker-php-ext-install \
-        gd \
-        pdo \
-        pdo_mysql \
-        zip \
+    && docker-php-ext-configure gd --with-freetype --with-jpeg \
+    && docker-php-ext-install gd pdo pdo_mysql zip \
     && pecl install redis \
     && docker-php-ext-enable redis \
     && rm -rf /var/lib/apt/lists/*