diff --git a/dockerfiles/Dockerfile.training b/dockerfiles/Dockerfile.training
index bdc7c17b38..e7ed0bcf22 100644
--- a/dockerfiles/Dockerfile.training
+++ b/dockerfiles/Dockerfile.training
@@ -24,7 +24,11 @@ RUN apt-get -y update &&\
     apt-get -y --no-install-recommends install \
         curl \
         git \
-        language-pack-en
+        language-pack-en \
+        unattended-upgrades
+
+# update existing packages to minimize security vulnerabilities
+RUN unattended-upgrade
 
 RUN locale-gen en_US.UTF-8 && \
     update-locale LANG=en_US.UTF-8