diff --git a/lib/pulse/radar_store.ex b/lib/pulse/radar_store.ex
index 0de101e..26ea24f 100644
--- a/lib/pulse/radar_store.ex
+++ b/lib/pulse/radar_store.ex
@@ -51,8 +51,13 @@ defmodule Pulse.RadarStore do
 
   @impl true
   def init(_opts) do
-    path = Path.join(:code.priv_dir(:pulse), "data/radars.dets") |> to_charlist()
-    File.mkdir_p!(Path.dirname(to_string(path)))
+    # Read from the configurable data_dir (overridden in prod via DATA_DIR
+    # → /app/data, a Kamal-mounted volume). Matches Pulse.Store / Analytics
+    # / RadarAnalytics — using :code.priv_dir/1 here meant every deploy
+    # wiped the file because release dirs are rebuilt per image.
+    data_dir = Application.get_env(:pulse, :data_dir, "priv/data")
+    File.mkdir_p!(data_dir)
+    path = Path.join(data_dir, "radars.dets") |> String.to_charlist()
 
     case :dets.open_file(@table, file: path, type: :set) do
       {:ok, table} ->