diff --git a/php/5/build/Dockerfile b/php/5/build/Dockerfile
index 01af54be1..00db91289 100644
--- a/php/5/build/Dockerfile
+++ b/php/5/build/Dockerfile
@@ -4,9 +4,6 @@ FROM ${PHP_IMAGE}
 ARG PHP_EXTENSIONS
 ARG CONTAINER_PACKAGE_URL
 
-RUN sed -i "s|URIs: http://deb.debian.org/debian|URIs: ${CONTAINER_PACKAGE_URL}/debian|g" /etc/apt/sources.list.d/debian.sources && \
-    cat /etc/apt/sources.list.d/debian.sources && \
-    apt-get update
 
 COPY data/install-ext /usr/local/bin/
 RUN chmod uga+x /usr/local/bin/install-ext