diff --git a/Dockerfile b/Dockerfile
index c210cf79c..4e7c01c5d 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 &&\