diff --git a/heat/cmd/all.py b/heat/cmd/all.py
index d9c7dd0d68..526bc7fa29 100644
--- a/heat/cmd/all.py
+++ b/heat/cmd/all.py
@@ -20,12 +20,6 @@ An OpenStack Heat server that can run all services.
 
 import eventlet
 eventlet.monkey_patch(os=False)
-# Monkey patch the original current_thread to use the up-to-date _active
-# global variable. See https://bugs.launchpad.net/bugs/1863021 and
-# https://github.com/eventlet/eventlet/issues/592
-import __original_module_threading as orig_threading
-import threading  # noqa
-orig_threading.current_thread.__globals__['_active'] = threading._active
 
 import sys
 
diff --git a/heat/cmd/api.py b/heat/cmd/api.py
index 4ab22b0d66..b8ea0111cf 100644
--- a/heat/cmd/api.py
+++ b/heat/cmd/api.py
@@ -20,12 +20,6 @@ An OpenStack ReST API to Heat.
 
 import eventlet
 eventlet.monkey_patch(os=False)
-# Monkey patch the original current_thread to use the up-to-date _active
-# global variable. See https://bugs.launchpad.net/bugs/1863021 and
-# https://github.com/eventlet/eventlet/issues/592
-import __original_module_threading as orig_threading
-import threading  # noqa
-orig_threading.current_thread.__globals__['_active'] = threading._active
 
 import sys
 
diff --git a/heat/cmd/api_cfn.py b/heat/cmd/api_cfn.py
index 2a44605e5c..bc7cd5b022 100644
--- a/heat/cmd/api_cfn.py
+++ b/heat/cmd/api_cfn.py
@@ -22,12 +22,6 @@ AMQP RPC to implement them.
 
 import eventlet
 eventlet.monkey_patch(os=False)
-# Monkey patch the original current_thread to use the up-to-date _active
-# global variable. See https://bugs.launchpad.net/bugs/1863021 and
-# https://github.com/eventlet/eventlet/issues/592
-import __original_module_threading as orig_threading
-import threading  # noqa
-orig_threading.current_thread.__globals__['_active'] = threading._active
 
 import sys
 
diff --git a/heat/cmd/engine.py b/heat/cmd/engine.py
index b969a4c22b..f30081d7e7 100644
--- a/heat/cmd/engine.py
+++ b/heat/cmd/engine.py
@@ -22,12 +22,6 @@ engine.
 
 import eventlet
 eventlet.monkey_patch()
-# Monkey patch the original current_thread to use the up-to-date _active
-# global variable. See https://bugs.launchpad.net/bugs/1863021 and
-# https://github.com/eventlet/eventlet/issues/592
-import __original_module_threading as orig_threading
-import threading  # noqa
-orig_threading.current_thread.__globals__['_active'] = threading._active
 
 import sys
 
diff --git a/requirements.txt b/requirements.txt
index 5f3ad3fdfc..4f0a0b2c72 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@ pbr>=3.1.1 # Apache-2.0
 alembic>=1.8.0 # MIT
 croniter>=0.3.4 # MIT License
 cryptography>=2.5 # BSD/Apache-2.0
-eventlet>=0.18.2 # MIT
+eventlet>=0.27.0 # MIT
 keystoneauth1>=3.18.0 # Apache-2.0
 keystonemiddleware>=5.1.0 # Apache-2.0
 lxml>=4.5.0 # BSD