diff --git a/Dockerfile b/Dockerfile
index c90b043b0..9c73fff55 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 FROM bitwalker/alpine-elixir:latest
 
-RUN apk add inotify-tools postgresql-client yarn
+RUN apk add inotify-tools postgresql-client yarn file
 RUN apk add --no-cache make gcc libc-dev argon2 imagemagick
 
 RUN mix local.hex --force && mix local.rebar --force