diff --git a/README.md b/README.md
index 363735f..4ca6092 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ It is a part of [Membrane Multimedia Framework](https://membrane.stream).
 Add the following line to your `deps` in `mix.exs`. Run `mix deps.get`.
 
 ```elixir
-{:membrane_ffmpeg_swresample_plugin, "~> 0.20.1"}
+{:membrane_ffmpeg_swresample_plugin, "~> 0.20.2"}
 ```
 
 The precompiled builds of the [ffmpeg](https://www.ffmpeg.org) will be pulled and linked automatically. However, should there be any problems, consider installing it manually.
diff --git a/lib/membrane_ffmpeg_swresample_plugin/converter.ex b/lib/membrane_ffmpeg_swresample_plugin/converter.ex
index 966df0e..138706d 100644
--- a/lib/membrane_ffmpeg_swresample_plugin/converter.ex
+++ b/lib/membrane_ffmpeg_swresample_plugin/converter.ex
@@ -117,14 +117,18 @@ defmodule Membrane.FFmpeg.SWResample.Converter do
     check_dropped_frames(state)
 
     flushed_actions =
-      case flush!(state.native) do
-        <<>> ->
-          []
-
-        converted ->
-          output_duration = calculate_output_duration(converted, state)
-          {_state, out_pts} = update_pts_queue(state, output_duration, true)
-          [buffer: {:output, %Buffer{payload: converted, pts: out_pts}}]
+      if state.native == nil do
+        []
+      else
+        case flush!(state.native) do
+          <<>> ->
+            []
+
+          converted ->
+            output_duration = calculate_output_duration(converted, state)
+            {_state, out_pts} = update_pts_queue(state, output_duration, true)
+            [buffer: {:output, %Buffer{payload: converted, pts: out_pts}}]
+        end
       end
 
     # create new converter
diff --git a/mix.exs b/mix.exs
index 2c48cbe..8819aaa 100644
--- a/mix.exs
+++ b/mix.exs
@@ -2,7 +2,7 @@ defmodule Membrane.FFmpeg.SWResample.Mixfile do
   use Mix.Project
 
   @github_url "https://github.com/membraneframework/membrane_ffmpeg_swresample_plugin"
-  @version "0.20.1"
+  @version "0.20.2"
 
   def project do
     [