diff --git a/Dockerfile b/Dockerfile
index e0f7035..e9150da 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -64,9 +64,9 @@ RUN apt-get update -y && \
 
 # Set the locale
 RUN sed -i '/en_US.UTF-8/s/^# //g' /etc/locale.gen && locale-gen
-ENV LANG en_US.UTF-8
-ENV LANGUAGE en_US:en
-ENV LC_ALL en_US.UTF-8
+ENV LANG=en_US.UTF-8
+ENV LANGUAGE=en_US:en
+ENV LC_ALL=en_US.UTF-8
 
 WORKDIR /app
 
@@ -79,7 +79,7 @@ COPY --from=builder --chown=nobody:root /build/app/_build/${MIX_ENV}/rel/firehos
 USER nobody
 
 # Dokku uses the EXPOSE port for routing
-EXPOSE 4000
+EXPOSE 5000
 
 ENV PHX_SERVER=true
 
diff --git a/app/config/runtime.exs b/app/config/runtime.exs
index d48bf27..f0f4e40 100644
--- a/app/config/runtime.exs
+++ b/app/config/runtime.exs
@@ -51,7 +51,7 @@ if config_env() == :prod do
       """
 
   host = System.get_env("PHX_HOST") || "example.com"
-  port = String.to_integer(System.get_env("PORT") || "4000")
+  port = String.to_integer(System.get_env("PORT") || "5000")
 
   config :firehose, :dns_cluster_query, System.get_env("DNS_CLUSTER_QUERY")
 
diff --git a/dokku-setup.sh.sample b/dokku-setup.sh.sample
index 13019eb..ed49e76 100644
--- a/dokku-setup.sh.sample
+++ b/dokku-setup.sh.sample
@@ -28,7 +28,7 @@ echo "==> Setting environment variables"
 dokku config:set --no-restart "$APP" \
   SECRET_KEY_BASE="$SECRET_KEY_BASE" \
   PHX_HOST="$PHX_HOST" \
-  PORT="4000"
+  PORT="5000"
 
 echo ""
 echo "==> Setup complete!"