diff --git a/Dockerfile b/Dockerfile
index e7a5ae0a..bfbd9a2a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,6 +2,9 @@ FROM openjdk:8u212-jre-alpine
 
 LABEL org.opencontainers.image.authors="Geoff Bourne <itzgeoff@gmail.com>"
 
+# upgrade all packages since alpine jre8 base image tops out at 8u212
+RUN apk -U --no-cache upgrade
+
 RUN apk add --no-cache -U \
   openssl \
   imagemagick \