diff --git a/lower-constraints.txt b/lower-constraints.txt
index 8cda2555e..394729ad4 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -80,7 +80,7 @@ oslo.middleware==3.31.0
 oslo.policy==1.30.0
 oslo.serialization==2.18.0
 oslo.service==1.24.0
-oslo.utils==3.33.0
+oslo.utils==3.37.0
 oslosphinx==4.7.0
 oslotest==3.2.0
 osprofiler==1.4.0
diff --git a/mistral/rpc/kombu/kombu_listener.py b/mistral/rpc/kombu/kombu_listener.py
index 157c0cd2d..d44aa4537 100644
--- a/mistral/rpc/kombu/kombu_listener.py
+++ b/mistral/rpc/kombu/kombu_listener.py
@@ -19,6 +19,7 @@ import six
 import threading
 
 from oslo_log import log as logging
+from oslo_utils import eventletutils
 
 from mistral.rpc.kombu import base as kombu_base
 
@@ -34,7 +35,7 @@ class KombuRPCListener(ConsumerMixin):
         self._thread = None
         self.connection = six.next(self._connections)
 
-        self.ready = threading.Event()
+        self.ready = eventletutils.Event()
 
     def add_listener(self, correlation_id):
         self._results[correlation_id] = six.moves.queue.Queue()
diff --git a/mistral/rpc/kombu/kombu_server.py b/mistral/rpc/kombu/kombu_server.py
index 51c556d02..3ac474255 100644
--- a/mistral/rpc/kombu/kombu_server.py
+++ b/mistral/rpc/kombu/kombu_server.py
@@ -20,6 +20,7 @@ import time
 import kombu
 from oslo_config import cfg
 from oslo_log import log as logging
+from oslo_utils import eventletutils
 from stevedore import driver
 
 from mistral import context as auth_ctx
@@ -68,8 +69,8 @@ class KombuRPCServer(rpc_base.RPCServer, kombu_base.Base):
         self.routing_key = self.topic
         self.channel = None
         self.conn = None
-        self._running = threading.Event()
-        self._stopped = threading.Event()
+        self._running = eventletutils.Event()
+        self._stopped = eventletutils.Event()
         self.endpoints = []
         self._worker = None
         self._thread = None
diff --git a/requirements.txt b/requirements.txt
index 084365536..6d45ab0e8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,7 +24,7 @@ oslo.i18n>=3.15.3 # Apache-2.0
 oslo.messaging>=5.29.0 # Apache-2.0
 oslo.middleware>=3.31.0 # Apache-2.0
 oslo.policy>=1.30.0 # Apache-2.0
-oslo.utils>=3.33.0 # Apache-2.0
+oslo.utils>=3.37.0 # Apache-2.0
 oslo.log>=3.36.0 # Apache-2.0
 oslo.serialization!=2.19.1,>=2.18.0 # Apache-2.0
 oslo.service!=1.28.1,>=1.24.0 # Apache-2.0