diff --git a/Dockerfile b/Dockerfile
index 82bd8519cbf377278dc21070bc0065b00e1d1d44..b1b5171af458f40f2997e613b1225cda0d424389 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,7 +4,7 @@ COPY . .
 
 ENV MIX_ENV=prod
 
-RUN apk add git gcc g++ musl-dev make cmake &&\
+RUN apk add git gcc g++ musl-dev make cmake file-dev &&\
 	echo "import Mix.Config" > config/prod.secret.exs &&\
 	mix local.hex --force &&\
 	mix local.rebar --force &&\