diff --git a/deploy/rails-prod-Dockerfile b/deploy/rails-prod-Dockerfile
index 5937155..b1b53a4 100644
--- a/deploy/rails-prod-Dockerfile
+++ b/deploy/rails-prod-Dockerfile
@@ -1,6 +1,7 @@
 FROM ruby:2.4.2
 
 RUN apt-get -qq update \
+  && DEBIAN_FRONTEND=noninteractive apt-get -qq upgrade -y \
   && DEBIAN_FRONTEND=noninteractive apt-get -qq install -y \
     build-essential \
     libssl-dev \