diff --git a/lib/exvcr/actor.ex b/lib/exvcr/actor.ex
index cebba86..de9a6dc 100644
--- a/lib/exvcr/actor.ex
+++ b/lib/exvcr/actor.ex
@@ -8,29 +8,71 @@ defmodule ExVCR.Actor do
     Stores request/response for the recorder.
     """
 
-    use ExActor.GenServer
+    use GenServer
 
-    defstart start(arg), do: initial_state(arg)
+    def start(arg) do
+      GenServer.start(__MODULE__, arg)
+    end
+
+    def append(pid, x) do
+      GenServer.cast(pid, {:append, x})
+    end
+
+    def set(pid, x) do
+      GenServer.cast(pid, {:set, x})
+    end
+
+    def get(pid) do
+      GenServer.call(pid, :get)
+    end
+
+    def update(pid, finder, updater) do
+      GenServer.call(pid, {:update, finder, updater})
+    end
+
+    def pop(pid) do
+      GenServer.call(pid, :pop)
+    end
 
-    defcast append(x), state: state, do: new_state([x|state])
-    defcast set(x), do: new_state(x)
-    defcall get, state: state, do: reply(state)
+    # Callbacks
 
-    defcall update(finder, updater), state: state do
-      state = Enum.map(state, fn(record) ->
+    @impl true
+    def init(arg) do
+      {:ok, arg}
+    end
+
+    @impl true
+    def handle_cast({:append, x}, state) do
+      {:noreply, [x|state]}
+    end
+
+    @impl true
+    def handle_cast({:set, x}, _state) do
+      {:noreply, x}
+    end
+
+    @impl true
+    def handle_call(:get, _from, state) do
+      {:reply, state, state}
+    end
+
+    @impl true
+    def handle_call({:update, finder, updater}, _from, state) do
+      new_state = Enum.map(state, fn(record) ->
         if finder.(record) do
           updater.(record)
         else
           record
         end
       end)
-      set_and_reply(state, state)
+      {:reply, new_state, new_state}
     end
 
-    defcall pop(), state: state do
+    @impl true
+    def handle_call(:pop, _from, state) do
       case state do
-        [] -> reply(state)
-        [head | tail] -> set_and_reply(tail, head)
+        [] -> {:reply, state, state}
+        [head | tail] -> {:reply, head, tail}
       end
     end
   end
@@ -40,12 +82,36 @@ defmodule ExVCR.Actor do
     Stores option parameters for the recorder.
     """
 
-    use ExActor.GenServer
+    use GenServer
 
-    defstart start(arg), do: initial_state(arg)
+    def start(arg) do
+      GenServer.start(__MODULE__, arg)
+    end
 
-    defcast set(x), do: new_state(x)
-    defcall get, state: state, do: reply(state)
+    def set(pid, x) do
+      GenServer.cast(pid, {:set, x})
+    end
+
+    def get(pid) do
+      GenServer.call(pid, :get)
+    end
+
+    # Callbacks
+
+    @impl true
+    def init(arg) do
+      {:ok, arg}
+    end
+
+    @impl true
+    def handle_cast({:set, x}, _state) do
+      {:noreply, x}
+    end
+
+    @impl true
+    def handle_call(:get, _from, state) do
+      {:reply, state, state}
+    end
   end
 
   defmodule CurrentRecorder do
@@ -53,13 +119,37 @@ defmodule ExVCR.Actor do
     Stores current recorder to be able to fetch it inside of the mocked version of the adapter.
     """
 
-    use ExActor.GenServer, export: __MODULE__
+    use GenServer
+
+    def start_link(_) do
+      GenServer.start_link(__MODULE__, default_state(), name: __MODULE__)
+    end
 
-    defstart(start_link(_), do: default_state() |> initial_state())
+    def set(x) do
+      GenServer.cast(__MODULE__, {:set, x})
+    end
 
-    defcast(set(x), do: new_state(x))
-    defcall(get, state: state, do: reply(state))
+    def get do
+      GenServer.call(__MODULE__, :get)
+    end
 
     def default_state(), do: nil
+
+    # Callbacks
+
+    @impl true
+    def init(state) do
+      {:ok, state}
+    end
+
+    @impl true
+    def handle_cast({:set, x}, _state) do
+      {:noreply, x}
+    end
+
+    @impl true
+    def handle_call(:get, _from, state) do
+      {:reply, state, state}
+    end
   end
 end
diff --git a/lib/exvcr/checker.ex b/lib/exvcr/checker.ex
index 8539fe0..9c8a879 100644
--- a/lib/exvcr/checker.ex
+++ b/lib/exvcr/checker.ex
@@ -4,13 +4,23 @@ defmodule ExVCR.Checker do
   It's for [mix vcr.check] task.
   """
 
-  use ExActor.GenServer, export: :singleton
+  use GenServer
 
-  defstart start(arg), do: initial_state(arg)
+  def start(arg) do
+    GenServer.start(__MODULE__, arg, name: :singleton)
+  end
+
+  def get do
+    GenServer.call(:singleton, :get)
+  end
+
+  def set(x) do
+    GenServer.cast(:singleton, {:set, x})
+  end
 
-  defcall get, state: state, do: reply(state)
-  defcast set(x), do: new_state(x)
-  defcast append(x), state: state, do: new_state(%{state | files: [x|state.files]})
+  def append(x) do
+    GenServer.cast(:singleton, {:append, x})
+  end
 
   @doc """
   Increment the counter for cache cassettes hit.
@@ -26,4 +36,26 @@ defmodule ExVCR.Checker do
       ExVCR.Checker.append({type, ExVCR.Recorder.get_file_path(recorder)})
     end
   end
+
+  # Callbacks
+
+  @impl true
+  def init(arg) do
+    {:ok, arg}
+  end
+
+  @impl true
+  def handle_call(:get, _from, state) do
+    {:reply, state, state}
+  end
+
+  @impl true
+  def handle_cast({:set, x}, _state) do
+    {:noreply, x}
+  end
+
+  @impl true
+  def handle_cast({:append, x}, state) do
+    {:noreply, %{state | files: [x|state.files]}}
+  end
 end
diff --git a/lib/exvcr/mock_lock.ex b/lib/exvcr/mock_lock.ex
index ce9e67f..4d75e06 100644
--- a/lib/exvcr/mock_lock.ex
+++ b/lib/exvcr/mock_lock.ex
@@ -1,9 +1,9 @@
 defmodule ExVCR.MockLock do
-  use ExActor.GenServer, export: :mock_lock
+  use GenServer
   @ten_milliseconds 10
 
-  defstart start() do
-    initial_state(%{lock_holder: nil})
+  def start() do
+    GenServer.start(__MODULE__, %{lock_holder: nil}, name: :mock_lock)
   end
 
   def ensure_started do
@@ -12,38 +12,50 @@ defmodule ExVCR.MockLock do
     end
   end
 
-  defcast request_lock(caller_pid, test_pid) do
+  def request_lock(caller_pid, test_pid) do
+    GenServer.cast(:mock_lock, {:request_lock, caller_pid, test_pid})
+  end
+
+  def release_lock() do
+    GenServer.call(:mock_lock, :release_lock)
+  end
+
+  # Callbacks
+
+  @impl true
+  def init(state) do
+    {:ok, state}
+  end
+
+  @impl true
+  def handle_cast({:request_lock, caller_pid, test_pid}, state) do
     Process.send(self(), {:do_request_lock, caller_pid, test_pid}, [])
-    noreply()
+    {:noreply, state}
   end
 
-  defhandleinfo {:do_request_lock, caller_pid, test_pid}, state: state do
+  @impl true
+  def handle_info({:do_request_lock, caller_pid, test_pid}, state) do
     if Map.get(state, :lock_holder) do
       Process.send_after(self(), {:do_request_lock, caller_pid, test_pid}, @ten_milliseconds)
-      noreply()
+      {:noreply, state}
     else
       Process.monitor(test_pid)
       Process.send(caller_pid, :lock_granted, [])
-
-      state
-      |> Map.put(:lock_holder, caller_pid)
-      |> new_state
+      {:noreply, Map.put(state, :lock_holder, caller_pid)}
     end
   end
 
-  defhandleinfo {:DOWN, _ref, :process, pid, _}, state: state do
+  @impl true
+  def handle_info({:DOWN, _ref, :process, pid, _}, state) do
     if state.lock_holder == pid do
-      state
-      |> Map.put(:lock_holder, nil)
-      |> new_state
+      {:noreply, Map.put(state, :lock_holder, nil)}
     else
-      noreply()
+      {:noreply, state}
     end
   end
 
-  defcall release_lock(), state: state do
-    state
-    |> Map.put(:lock_holder, nil)
-    |> set_and_reply(:ok)
+  @impl true
+  def handle_call(:release_lock, _from, state) do
+    {:reply, :ok, Map.put(state, :lock_holder, nil)}
   end
 end
diff --git a/mix.exs b/mix.exs
index ddf5136..b48fad4 100644
--- a/mix.exs
+++ b/mix.exs
@@ -20,13 +20,12 @@ defmodule ExVCR.Mixfile do
   end
 
   def application do
-    [applications: [:meck, :exactor, :exjsx], mod: {ExVCR.Application, []}]
+    [applications: [:meck, :exjsx], mod: {ExVCR.Application, []}]
   end
 
   def deps do
     [
       {:meck, "~> 0.8"},
-      {:exactor, "~> 2.2"},
       {:exjsx, "~> 4.0"},
       {:ibrowse, "4.4.0", optional: true},
       {:httpotion, "~> 3.1", optional: true},