diff --git a/cms/envs/devstack.py b/cms/envs/devstack.py
index ee0e74f433..52e1acbfad 100644
--- a/cms/envs/devstack.py
+++ b/cms/envs/devstack.py
@@ -230,6 +230,17 @@ add_plugins(__name__, ProjectType.CMS, SettingsType.DEVSTACK)
 
 OPENAPI_CACHE_TIMEOUT = 0
 
+#####################################################################
+# set replica set of contentstore to none as we haven't setup any for cms in devstack
+CONTENTSTORE['DOC_STORE_CONFIG']['replicaSet'] = None
+
+#####################################################################
+# set replica sets of moduelstore to none as we haven't setup any for cms in devstack
+for store in MODULESTORE['default']['OPTIONS']['stores']:
+    if 'DOC_STORE_CONFIG' in store and 'replicaSet' in store['DOC_STORE_CONFIG']:
+        store['DOC_STORE_CONFIG']['replicaSet'] = None
+
+
 #####################################################################
 # Lastly, run any migrations, if needed.
 MODULESTORE = convert_module_store_setting_if_needed(MODULESTORE)
diff --git a/lms/envs/devstack.py b/lms/envs/devstack.py
index 8810c867c2..0a535278d6 100644
--- a/lms/envs/devstack.py
+++ b/lms/envs/devstack.py
@@ -329,10 +329,22 @@ REST_FRAMEWORK['DEFAULT_RENDERER_CLASSES'] += (
 
 OPENAPI_CACHE_TIMEOUT = 0
 
+#####################################################################
+# set replica set of contentstore to none as we haven't setup any for lms in devstack
+CONTENTSTORE['DOC_STORE_CONFIG']['replicaSet'] = None
+
+#####################################################################
+# set replica sets of moduelstore to none as we haven't setup any for lms in devstack
+for store in MODULESTORE['default']['OPTIONS']['stores']:
+    if 'DOC_STORE_CONFIG' in store and 'replicaSet' in store['DOC_STORE_CONFIG']:
+        store['DOC_STORE_CONFIG']['replicaSet'] = None
+
+
 #####################################################################
 # Lastly, run any migrations, if needed.
 MODULESTORE = convert_module_store_setting_if_needed(MODULESTORE)
 
+
 SECRET_KEY = '85920908f28904ed733fe576320db18cabd7b6cd'
 
 EDXNOTES_INTERNAL_API = 'http://edx.devstack.edxnotesapi:18120/api/v1'
diff --git a/requirements/constraints.txt b/requirements/constraints.txt
index 02773191e2..a21b524a60 100644
--- a/requirements/constraints.txt
+++ b/requirements/constraints.txt
@@ -36,8 +36,9 @@ django-oauth-toolkit<=1.3.2
 # Will be updated once we update python-dateutil package
 matplotlib<3.4.0
 
-# tests failing for pymongo==3.11
-pymongo<3.11
+# constrained in opaque_keys. migration guide here: https://pymongo.readthedocs.io/en/4.0/migrate-to-pymongo4.html
+# Major upgrade will be done in separate ticket.
+pymongo<4.0.0
 
 # python3-saml==1.10.0 version started breaking a11y tests
 python3-saml<1.10.0
diff --git a/requirements/edx/base.txt b/requirements/edx/base.txt
index f0d3b10e7a..b464311d1d 100644
--- a/requirements/edx/base.txt
+++ b/requirements/edx/base.txt
@@ -831,9 +831,8 @@ pylatexenc==2.10
     # via olxcleaner
 pylti1p3==1.11.0
     # via -r requirements/edx/base.in
-pymongo==3.10.1
+pymongo==3.12.3
     # via
-    #   -c requirements/edx/../constraints.txt
     #   -r requirements/edx/base.in
     #   -r requirements/edx/paver.txt
     #   edx-opaque-keys
diff --git a/requirements/edx/development.txt b/requirements/edx/development.txt
index f2c3e61dc6..e7ecfaa3b4 100644
--- a/requirements/edx/development.txt
+++ b/requirements/edx/development.txt
@@ -1133,9 +1133,8 @@ pylint-pytest==0.3.0
     # via -r requirements/edx/testing.txt
 pylti1p3==1.11.0
     # via -r requirements/edx/testing.txt
-pymongo==3.10.1
+pymongo==3.12.3
     # via
-    #   -c requirements/edx/../constraints.txt
     #   -r requirements/edx/testing.txt
     #   edx-opaque-keys
     #   event-tracking
diff --git a/requirements/edx/paver.txt b/requirements/edx/paver.txt
index 87e86afebd..3f369a3ab9 100644
--- a/requirements/edx/paver.txt
+++ b/requirements/edx/paver.txt
@@ -28,7 +28,7 @@ pbr==5.9.0
     # via stevedore
 psutil==5.9.1
     # via -r requirements/edx/paver.in
-pymongo==3.10.1
+pymongo==3.12.3
     # via
     #   -c requirements/edx/../constraints.txt
     #   -r requirements/edx/paver.in
diff --git a/requirements/edx/testing.txt b/requirements/edx/testing.txt
index d67aba5c31..d0cb2b0797 100644
--- a/requirements/edx/testing.txt
+++ b/requirements/edx/testing.txt
@@ -1068,9 +1068,8 @@ pylint-pytest==0.3.0
     # via -r requirements/edx/testing.in
 pylti1p3==1.11.0
     # via -r requirements/edx/base.txt
-pymongo==3.10.1
+pymongo==3.12.3
     # via
-    #   -c requirements/edx/../constraints.txt
     #   -r requirements/edx/base.txt
     #   edx-opaque-keys
     #   event-tracking