diff --git a/HISTORY.rst b/HISTORY.rst
index bfac38ae..d7c8bf40 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -6,6 +6,11 @@ Release Notes
 PlatformIO Core 4
 -----------------
 
+4.3.3 (2020-??-??)
+~~~~~~~~~~~~~~~~~~
+
+* Fixed "UnicodeDecodeError: 'utf-8' codec can't decode byte" when non-Latin chars are used in project path (`issue #3481 <https://github.com/platformio/platformio-core/issues/3481>`_)
+
 4.3.2 (2020-04-28)
 ~~~~~~~~~~~~~~~~~~
 
diff --git a/docs b/docs
index bff1fc84..256c255e 160000
--- a/docs
+++ b/docs
@@ -1 +1 @@
-Subproject commit bff1fc845ba76ef25d692ba6079123148f783048
+Subproject commit 256c255e89dad85af1c9a7177f606bac3c282c6c
diff --git a/platformio/proc.py b/platformio/proc.py
index 1937b257..80e50201 100644
--- a/platformio/proc.py
+++ b/platformio/proc.py
@@ -20,7 +20,6 @@ from threading import Thread
 
 from platformio import exception
 from platformio.compat import (
-    PY2,
     WINDOWS,
     get_filesystem_encoding,
     get_locale_encoding,
@@ -31,10 +30,7 @@ from platformio.compat import (
 class AsyncPipeBase(object):
     def __init__(self):
         self._fd_read, self._fd_write = os.pipe()
-        if PY2:
-            self._pipe_reader = os.fdopen(self._fd_read)
-        else:
-            self._pipe_reader = os.fdopen(self._fd_read, encoding="utf-8")
+        self._pipe_reader = os.fdopen(self._fd_read)
         self._buffer = ""
         self._thread = Thread(target=self.run)
         self._thread.start()