diff --git a/.gitignore b/.gitignore
index 56666fc..ecc3511 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,3 +11,4 @@ eventlet-0.9.9.tar.gz
 /eventlet-0.17.4.tar.gz
 /eventlet-0.18.4.tar.gz
 /eventlet-0.20.1.tar.gz
+/eventlet-0.21.0.tar.gz
diff --git a/0001-greenio-send-was-running-empty-loop-on-ENOTCONN.patch b/0001-greenio-send-was-running-empty-loop-on-ENOTCONN.patch
deleted file mode 100644
index 817722e..0000000
--- a/0001-greenio-send-was-running-empty-loop-on-ENOTCONN.patch
+++ /dev/null
@@ -1,40 +0,0 @@
-From ed0655333007fe97624b745e92deb407d192022c Mon Sep 17 00:00:00 2001
-From: Sergey Shepelev <temotor@gmail.com>
-Date: Fri, 15 May 2015 03:56:04 +0300
-Subject: [PATCH] greenio: send() was running empty loop on ENOTCONN; Thanks to
- Seyeong Kim
-
-https://github.com/eventlet/eventlet/issues/192
-
-cherry-picked-from: ed0655333007fe97624b745e92deb407d192022c
----
- AUTHORS                  | 1 +
- eventlet/greenio/base.py | 3 ++-
- 2 files changed, 3 insertions(+), 1 deletion(-)
-
-diff --git a/AUTHORS b/AUTHORS
-index e0ab0e2..c57f010 100644
---- a/AUTHORS
-+++ b/AUTHORS
-@@ -119,3 +119,4 @@ Thanks To
- * Sean Dague, wsgi: Provide python logging compatibility
- * Tim Simmons, Use _socket_nodns and select in dnspython support
- * Antonio Cuni, fix fd double close on PyPy
-+* Seyeong Kim
-diff --git a/eventlet/greenio/base.py b/eventlet/greenio/base.py
-index 8da51ca..1e43176 100644
---- a/eventlet/greenio/base.py
-+++ b/eventlet/greenio/base.py
-@@ -358,7 +358,8 @@ class GreenSocket(object):
-             try:
-                 total_sent += fd.send(data[total_sent:], flags)
-             except socket.error as e:
--                if get_errno(e) not in SOCKET_BLOCKING:
-+                eno = get_errno(e)
-+                if eno == errno.ENOTCONN or eno not in SOCKET_BLOCKING:
-                     raise
- 
-             if total_sent == len_data:
--- 
-2.1.0
-
diff --git a/sources b/sources
index e75195d..d508a81 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (eventlet-0.20.1.tar.gz) = 875c1ca82822a486bf28866c7d1f34df2419e7d33450a21740434d2e7f15c37a1090436cb7fe1feaeb5c810d39e4b238206c502323317897c8a42e844cbe7734
+SHA512 (eventlet-0.21.0.tar.gz) = 4ee682ca8faf870ff6f1d72e93527028f73ae13d7f755eceafb23f3cde48e52b83ff04b645b7e90299997713de93c52f244db8b81d6abc7788a56ea38c7b0f47