diff --git a/doc/requirements.txt b/doc/requirements.txt
index 23c20937d..90fcbd877 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -6,5 +6,5 @@ sphinx!=1.6.6,!=1.6.7,>=1.6.2 # BSD
 sphinxcontrib-apidoc>=0.2.0  # BSD
 reno>=2.5.0 # Apache-2.0
 os-api-ref>=1.4.0 # Apache-2.0
-pymongo!=3.1,>=3.0.2 # Apache-2.0
+pymongo>=3.6.0 # Apache-2.0
 redis>=2.10.0 # MIT
diff --git a/lower-constraints.txt b/lower-constraints.txt
index 62583109a..b32919856 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -40,7 +40,7 @@ osprofiler==1.4.0
 pbr==2.0.0
 pep8==1.5.7
 Pygments==2.2.0
-pymongo==3.0.2
+pymongo==3.6.0
 PyMySQL==0.7.6
 python-keystoneclient==3.8.0
 python-memcached==1.56
diff --git a/test-requirements.txt b/test-requirements.txt
index 99d6442ac..5dc64c798 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -9,7 +9,7 @@ mock>=2.0.0 # BSD
 
 # Backends
 redis>=2.10.0 # MIT
-pymongo!=3.1,>=3.0.2 # Apache-2.0
+pymongo>=3.6.0 # Apache-2.0
 python-swiftclient>=3.2.0 # Apache-2.0
 websocket-client>=0.44.0 # LGPLv2+
 PyMySQL>=0.7.6 # MIT License
diff --git a/tox.ini b/tox.ini
index 625324909..47b6a1ed2 100644
--- a/tox.ini
+++ b/tox.ini
@@ -5,12 +5,13 @@ skipsdist = True
 
 [testenv]
 usedevelop = True
-install_command = pip install -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt} {opts} {packages}
+install_command = pip install {opts} {packages}
 setenv = VIRTUAL_ENV={envdir}
          ZAQAR_TESTS_CONFIGS_DIR={toxinidir}/zaqar/tests/etc/
          ZAQAR_TEST_MONGODB=1
          ZAQAR_TEST_SLOW=1
-deps = -r{toxinidir}/requirements.txt
+deps = -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt}
+       -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 commands =
     find . -type f -name "*.pyc" -delete