diff --git a/openstack/block_storage/v3/_proxy.py b/openstack/block_storage/v3/_proxy.py
index 6b17f9151..cf2d675e7 100644
--- a/openstack/block_storage/v3/_proxy.py
+++ b/openstack/block_storage/v3/_proxy.py
@@ -1293,7 +1293,11 @@ class Proxy(_base_proxy.BaseBlockStorageProxy):
         params = {}
         if project:
             params['project_id'] = resource.Resource._get_id(project)
-        return self._get(_limits.Limits, requires_id=False, **params)
+
+        # we don't use Proxy._get since that doesn't allow passing arbitrary
+        # query string parameters
+        res = self._get_resource(_limits.Limits, None)
+        return res.fetch(self, requires_id=False, **params)
 
     # ====== CAPABILITIES ======
     def get_capabilities(self, host):
diff --git a/openstack/block_storage/v3/limits.py b/openstack/block_storage/v3/limits.py
index fe726a6e6..71717b4f3 100644
--- a/openstack/block_storage/v3/limits.py
+++ b/openstack/block_storage/v3/limits.py
@@ -71,6 +71,12 @@ class Limits(resource.Resource):
     resource_key = "limits"
     base_path = "/limits"
 
+    _max_microversion = "3.39"
+
+    _query_mapping = resource.QueryParameters(
+        "project_id",
+    )
+
     # capabilities
     allow_fetch = True
 
diff --git a/openstack/tests/unit/block_storage/v3/test_proxy.py b/openstack/tests/unit/block_storage/v3/test_proxy.py
index 986fe3696..c8b82f76f 100644
--- a/openstack/tests/unit/block_storage/v3/test_proxy.py
+++ b/openstack/tests/unit/block_storage/v3/test_proxy.py
@@ -19,7 +19,6 @@ from openstack.block_storage.v3 import extension
 from openstack.block_storage.v3 import group
 from openstack.block_storage.v3 import group_snapshot
 from openstack.block_storage.v3 import group_type
-from openstack.block_storage.v3 import limits
 from openstack.block_storage.v3 import quota_class_set
 from openstack.block_storage.v3 import quota_set
 from openstack.block_storage.v3 import resource_filter
@@ -137,11 +136,13 @@ class TestPools(TestVolumeProxy):
 
 class TestLimit(TestVolumeProxy):
     def test_limits_get(self):
-        self.verify_get(
+        self._verify(
+            'openstack.resource.Resource.fetch',
             self.proxy.get_limits,
-            limits.Limits,
             method_args=[],
-            expected_kwargs={'requires_id': False},
+            method_kwargs={'project': 'foo'},
+            expected_args=[self.proxy],
+            expected_kwargs={'requires_id': False, 'project_id': 'foo'},
         )