diff --git a/config/prod.exs b/config/prod.exs
index 8ec9dec..9c42c9d 100644
--- a/config/prod.exs
+++ b/config/prod.exs
@@ -7,6 +7,8 @@ import Config
 # before starting your production server.
 config :pinchflat, PinchflatWeb.Endpoint, cache_static_manifest: "priv/static/cache_manifest.json"
 
+config :tzdata, :data_dir, "/etc/elixir_tzdata_data"
+
 # Configures Swoosh API Client
 config :swoosh, api_client: Swoosh.ApiClient.Finch, finch_name: Pinchflat.Finch
 
diff --git a/selfhosted.Dockerfile b/selfhosted.Dockerfile
index 1df3d3e..1101fc8 100644
--- a/selfhosted.Dockerfile
+++ b/selfhosted.Dockerfile
@@ -116,7 +116,7 @@ ENV LC_ALL en_US.UTF-8
 WORKDIR "/app"
 
 # Set up data volumes
-RUN mkdir /config /downloads
+RUN mkdir /config /downloads /etc/elixir_tzdata_data && chmod ugo+rw /etc/elixir_tzdata_data
 
 # set runner ENV
 ENV MIX_ENV="prod"
@@ -126,8 +126,6 @@ EXPOSE ${PORT}
 
 # Only copy the final release from the build stage
 COPY --from=builder /app/_build/${MIX_ENV}/rel/pinchflat ./
-# Update permissions to let the app write the tzdata files
-RUN chmod ugo+rw /app/lib/tzdata-*/priv/*
 
 # NEVER do this if you're running in an environment where you don't trust the user
 # (ie: most environments). This is only acceptable in a self-hosted environment.