diff --git a/config/prod.exs b/config/prod.exs
index 050640b..9c2f673 100644
--- a/config/prod.exs
+++ b/config/prod.exs
@@ -19,5 +19,8 @@ config :logger, level: :info
 # Structured JSON logs for production (machine-parseable by fly logs, journalctl, Loki, etc.)
 config :logger, :default_handler, formatter: {LoggerJSON.Formatters.Basic, []}
 
+# Persistent image cache on the Fly volume (survives deploys)
+config :berrypod, :image_cache_dir, "/data/image_cache"
+
 # Runtime production configuration, including reading
 # of environment variables, is done on config/runtime.exs.
diff --git a/lib/berrypod_web/endpoint.ex b/lib/berrypod_web/endpoint.ex
index bbf97c0..4f5199d 100644
--- a/lib/berrypod_web/endpoint.ex
+++ b/lib/berrypod_web/endpoint.ex
@@ -16,6 +16,15 @@ defmodule BerrypodWeb.Endpoint do
     websocket: [connect_info: [session: @session_options]],
     longpoll: [connect_info: [session: @session_options]]
 
+  # In prod, image variants live on the persistent volume (/data/image_cache)
+  # rather than inside the ephemeral release directory.
+  if image_cache_dir = Application.compile_env(:berrypod, :image_cache_dir) do
+    plug Plug.Static,
+      at: "/image_cache",
+      from: image_cache_dir,
+      cache_control_for_etags: "public, max-age=31536000, immutable"
+  end
+
   # Serve at "/" the static files from "priv/static" directory.
   # gzip only in prod — avoids stale .gz files from mix assets.deploy
   # shadowing freshly-built dev assets.
diff --git a/lib/berrypod_web/plugs/broken_url_tracker.ex b/lib/berrypod_web/plugs/broken_url_tracker.ex
index 978015c..ae65b97 100644
--- a/lib/berrypod_web/plugs/broken_url_tracker.ex
+++ b/lib/berrypod_web/plugs/broken_url_tracker.ex
@@ -34,6 +34,7 @@ defmodule BerrypodWeb.Plugs.BrokenUrlTracker do
   defp static_path?(path) do
     String.starts_with?(path, "/assets/") or
       String.starts_with?(path, "/images/") or
+      String.starts_with?(path, "/image_cache/") or
       String.starts_with?(path, "/favicon")
   end
 end