diff --git a/CHANGELOG b/CHANGELOG
index cc7cc6b..436722b 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,7 @@
+1.3.3 => 07/15/2020:    [FIXED] 0x0D got translated to 0x0A under Linux
+
+1.3.2 => 01/06/2019:    [FIXED] 0x11/0x13 stripped out under Linux
+
 1.3.1 => 07/26/2014:    [FIXED] Ruby 2.2 support
                         [NEW] UNIX MARK/SPACE parity (CMSPAR) support
 
diff --git a/ext/native/posix_serialport_impl.c b/ext/native/posix_serialport_impl.c
index 2f9325e..630749e 100644
--- a/ext/native/posix_serialport_impl.c
+++ b/ext/native/posix_serialport_impl.c
@@ -154,11 +154,14 @@ VALUE sp_create_impl(class, _port)
       rb_sys_fail(sTcgetattr);
    }
 
+   // clean oflag and iflag, you may get unexpected behaviour if any bit of iflag/oflag is set.
    params.c_oflag = 0;
+   params.c_iflag = 0;
+
    params.c_lflag = 0;
-   params.c_iflag &= (IXON | IXOFF | IXANY);
+   
    params.c_cflag |= CLOCAL | CREAD;
-   params.c_cflag &= ~HUPCL;
+   params.c_cflag &= ~(HUPCL | CRTSCTS);  // default not use RTS/CTS hw flow control
 
    if (tcsetattr(fd, TCSANOW, &params) == -1)
    {
diff --git a/lib/serialport/version.rb b/lib/serialport/version.rb
index 718c16c..b6c8d34 100644
--- a/lib/serialport/version.rb
+++ b/lib/serialport/version.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class SerialPort
-  VERSION = "1.3.2"
+  VERSION = '1.3.3'
 end