diff --git a/lib/aprsme/connection_monitor.ex b/lib/aprsme/connection_monitor.ex
index 969bf31..52ba255 100644
--- a/lib/aprsme/connection_monitor.ex
+++ b/lib/aprsme/connection_monitor.ex
@@ -22,6 +22,13 @@ defmodule Aprsme.ConnectionMonitor do
     :last_check
   ]
 
+  @type t :: %__MODULE__{
+          node_stats: %{optional(node()) => map()},
+          local_connections: non_neg_integer(),
+          draining: boolean(),
+          last_check: integer()
+        }
+
   def start_link(opts) do
     GenServer.start_link(__MODULE__, opts, name: __MODULE__)
   end
diff --git a/lib/aprsme_web/live/map_live/packet_batcher.ex b/lib/aprsme_web/live/map_live/packet_batcher.ex
index 131b9a3..f8aa71b 100644
--- a/lib/aprsme_web/live/map_live/packet_batcher.ex
+++ b/lib/aprsme_web/live/map_live/packet_batcher.ex
@@ -14,6 +14,12 @@ defmodule AprsmeWeb.MapLive.PacketBatcher do
 
   defstruct [:parent_pid, :buffer, :timer_ref]
 
+  @type t :: %__MODULE__{
+          parent_pid: pid(),
+          buffer: [map()],
+          timer_ref: reference() | nil
+        }
+
   @doc """
   Start the packet batcher for a LiveView process.
   """