diff --git a/Dockerfile b/Dockerfile
index a5050b3..001e45c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,6 +7,7 @@ ENV MIX_ENV=prod
 
 RUN echo "http://nl.alpinelinux.org/alpine/latest-stable/main" >> /etc/apk/repositories \
     && apk update \
+    && apk upgrade \
     && apk add git gcc g++ musl-dev make cmake file-dev \
     exiftool imagemagick libmagic ncurses postgresql-client ffmpeg