diff --git a/Dockerfile b/Dockerfile
index b126ec0..a786480 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM elixir:1.7-alpine
+FROM elixir:1.8-alpine
 
 ENV UID=911 GID=911 \
     MIX_ENV=prod
@@ -26,7 +26,6 @@ RUN mix local.rebar --force \
     && mix deps.get \
     && mix compile
 
-RUN mkdir /pleroma/uploads
 VOLUME /pleroma/uploads/
 
 CMD ["mix", "phx.server"]
diff --git a/README.md b/README.md
index ac002cb..8566831 100644
--- a/README.md
+++ b/README.md
@@ -122,7 +122,7 @@ docker-compose build
 docker build -t pleroma .
 ```
 
-I prefer the later because it's more verbose.
+I prefer the latter because it's more verbose.
 
 Setup the database:
 
@@ -136,6 +136,14 @@ Get your web push keys and copy them to `secret.exs`:
 docker-compose run --rm web mix web_push.gen.keypair
 ```
 
+You will need to build the image again, to pick up your updated `secret.exs` file:
+
+```
+docker-compose build
+# or
+docker build -t pleroma .
+```
+
 You can now launch your instance:
 
 ```sh