diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0473d80..fb84e1c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -22,9 +22,11 @@ jobs:
       matrix:
         include:
           - elixir: 1.13.1
-            otp: 24.2
+            otp: 24.3.4.17
           - elixir: 1.16.2
             otp: 26.2.5
+          - elixir: 1.19.1
+            otp: 28.1.1
 
     steps:
     - uses: actions/checkout@v4
diff --git a/lib/exsync/beam_monitor.ex b/lib/exsync/beam_monitor.ex
index ed8396a..436cb30 100644
--- a/lib/exsync/beam_monitor.ex
+++ b/lib/exsync/beam_monitor.ex
@@ -99,7 +99,7 @@ defmodule ExSync.BeamMonitor do
   defp track_module_change(:reload_module, module, state) do
     %State{reload_set: reload_set, unload_set: unload_set} = state
 
-    %State{
+    %{
       state
       | reload_set: MapSet.put(reload_set, module),
         unload_set: MapSet.delete(unload_set, module)
@@ -109,7 +109,7 @@ defmodule ExSync.BeamMonitor do
   defp track_module_change(:unload_module, module, state) do
     %State{reload_set: reload_set, unload_set: unload_set} = state
 
-    %State{
+    %{
       state
       | reload_set: MapSet.delete(reload_set, module),
         unload_set: MapSet.put(unload_set, module)
diff --git a/lib/exsync/src_monitor.ex b/lib/exsync/src_monitor.ex
index 730c738..4c88f01 100644
--- a/lib/exsync/src_monitor.ex
+++ b/lib/exsync/src_monitor.ex
@@ -58,9 +58,9 @@ defmodule ExSync.SrcMonitor do
     {:noreply, state}
   end
 
-  def handle_info(:throttle_timer_complete, state) do
+  def handle_info(:throttle_timer_complete, %State{} = state) do
     ExSync.Utils.recomplete()
-    state = %State{state | throttle_timer: nil}
+    state = %{state | throttle_timer: nil}
     {:noreply, state}
   end
 
diff --git a/lib/exsync/utils.ex b/lib/exsync/utils.ex
index 38c8d54..ebe5bed 100644
--- a/lib/exsync/utils.ex
+++ b/lib/exsync/utils.ex
@@ -13,13 +13,13 @@ defmodule ExSync.Utils do
   end
 
   def unload(beam_path) do
-    beam_path |> Path.basename(".beam") |> String.to_atom() |> unload
+    beam_path |> Path.basename(".beam") |> String.to_atom() |> unload()
   end
 
   # beam file path
   def reload(beam_path) do
     ExSync.Logger.debug("reload module #{Path.basename(beam_path, ".beam")}")
-    file = beam_path |> to_charlist
+    file = beam_path |> to_charlist()
     {:ok, binary, _} = :erl_prim_loader.get_file(file)
     module = beam_path |> Path.basename(".beam") |> String.to_atom()
     :code.load_binary(module, file, binary)