diff --git a/build-in-docker.sh b/build-in-docker.sh
index fc13547..44371d8 100755
--- a/build-in-docker.sh
+++ b/build-in-docker.sh
@@ -167,6 +167,7 @@ for key in "${keys[@]}"; do
         | docker exec -i ${DOCKER_ID} apt-key add -
 done
 docker exec ${DOCKER_ID} apt-get update
+docker exec ${DOCKER_ID} apt-get upgrade
 for package in "${packages[@]}"; do
     ifthenelse "${package}" "apt-get install -y --force-yes ARG"
 done