diff --git a/pexpect_serial/serial_spawn.py b/pexpect_serial/serial_spawn.py
index c365c02..4c1726e 100644
--- a/pexpect_serial/serial_spawn.py
+++ b/pexpect_serial/serial_spawn.py
@@ -21,7 +21,13 @@
 
 """
 
-from pexpect import spawn
+# pexpect.spawn is not supported on some systems (i.e. Windows(TM))
+# See https://pexpect.readthedocs.io/en/stable/overview.html#pexpect-on-windows for details.
+import os
+if os.name in ['nt']:
+    from pexpect.fdpexpect import fdspawn as spawn
+else:
+    from pexpect import spawn
 from pexpect.exceptions import ExceptionPexpect
 
 __all__ = ['SerialSpawn']
diff --git a/requirements.txt b/requirements.txt
index ba37da6..5c5a3cd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,2 @@
 pyserial
-pexpect
+pexpect>=4
diff --git a/setup.py b/setup.py
index f98b11c..a3e9daf 100755
--- a/setup.py
+++ b/setup.py
@@ -7,7 +7,7 @@
 
 setuptools.setup(
     name='pexpect-serial',
-    version='0.1.0',
+    version='0.2.0',
     author='High Wall',
     author_email='hiwall@126.com',
     description='pexpect with pyserial',