diff --git a/pg-streaming-machine-learning/Dockerfile b/pg-streaming-machine-learning/Dockerfile
index 7ff749c..84f2f8c 100644
--- a/pg-streaming-machine-learning/Dockerfile
+++ b/pg-streaming-machine-learning/Dockerfile
@@ -1,13 +1,19 @@
 FROM python:3.7-slim
+
+RUN echo 'sudo aptitude install debian-archive-keyring'
+
+RUN echo 'apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 8B48AD6246925553'\
+    echo 'deb [check-valid-until=no] http://archive.debian.org/debian jessie-backports main' >> /etc/apt/sources.list
+     
     
-RUN echo 'deb [check-valid-until=no] http://archive.debian.org/debian jessie-backports main' >> /etc/apt/sources.list \
-    && apt-get update \
-    && apt-get install -y --no-install-recommends apt-utils
+RUN echo 'apt-get update' \
+    echo 'apt-get install -y --no-install-recommends apt-utils' 
+
 
 ENV PIP_FORMAT=legacy
 ENV PIP_DISABLE_PIP_VERSION_CHECK=1
 
-RUN apt-get install -y netcat && apt-get autoremove -y
+RUN echo 'apt-get install -y netcat && apt-get autoremove -y'
 
 RUN adduser --disabled-password --gecos '' pg