diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -111,13 +111,11 @@
 ```
 storage:
   cls: local
-  args:
-    db: "dbname=softwareheritage-dev user=<user> password=<pwd>"
-    objstorage:
-      cls: pathslicing
-      args:
-        root: /tmp/swh-storage/
-        slicing: 0:2/2:4/4:6
+  db: "dbname=softwareheritage-dev user=<user> password=<pwd>"
+  objstorage:
+    cls: pathslicing
+    root: /tmp/swh-storage/
+    slicing: 0:2/2:4/4:6
 ```
 
 which means, this uses:
@@ -175,8 +173,7 @@
 ```
 storage:
   cls: remote
-  args:
-    url: http://localhost:5002/
+  url: http://localhost:5002/
 ```
 
 You could directly define a local storage with the following snippet:
@@ -184,11 +181,9 @@
 ```
 storage:
   cls: local
-  args:
-    db: service=swh-dev
-    objstorage:
-      cls: pathslicing
-      args:
-        root: /home/storage/swh-storage/
-        slicing: 0:2/2:4/4:6
+  db: service=swh-dev
+  objstorage:
+    cls: pathslicing
+    root: /home/storage/swh-storage/
+    slicing: 0:2/2:4/4:6
 ```
diff --git a/requirements-swh.txt b/requirements-swh.txt
--- a/requirements-swh.txt
+++ b/requirements-swh.txt
@@ -1,3 +1,3 @@
 swh.core[db,http] >= 0.3
 swh.model >= 0.6.6
-swh.objstorage >= 0.0.40
+swh.objstorage >= 0.2.2
diff --git a/swh/storage/in_memory.py b/swh/storage/in_memory.py
--- a/swh/storage/in_memory.py
+++ b/swh/storage/in_memory.py
@@ -620,7 +620,7 @@
 
     def reset(self):
         self._cql_runner = InMemoryCqlRunner()
-        self.objstorage = ObjStorage({"cls": "memory", "args": {}})
+        self.objstorage = ObjStorage({"cls": "memory"})
 
     def check_config(self, *, check_write: bool) -> bool:
         return True
diff --git a/swh/storage/pytest_plugin.py b/swh/storage/pytest_plugin.py
--- a/swh/storage/pytest_plugin.py
+++ b/swh/storage/pytest_plugin.py
@@ -81,7 +81,7 @@
     yield {
         "cls": "local",
         "db": swh_storage_postgresql.dsn,
-        "objstorage": {"cls": "memory", "args": {}},
+        "objstorage": {"cls": "memory"},
         "check_config": {"check_write": True},
     }
 
diff --git a/swh/storage/tests/test_cassandra.py b/swh/storage/tests/test_cassandra.py
--- a/swh/storage/tests/test_cassandra.py
+++ b/swh/storage/tests/test_cassandra.py
@@ -169,8 +169,8 @@
         hosts=hosts,
         port=port,
         keyspace=keyspace,
-        journal_writer={"cls": "memory",},
-        objstorage={"cls": "memory", "args": {},},
+        journal_writer={"cls": "memory"},
+        objstorage={"cls": "memory"},
     )
 
     yield storage_config
diff --git a/swh/storage/tests/test_init.py b/swh/storage/tests/test_init.py
--- a/swh/storage/tests/test_init.py
+++ b/swh/storage/tests/test_init.py
@@ -24,7 +24,7 @@
         (
             "local",
             DbStorage,
-            {"db": "postgresql://db", "objstorage": {"cls": "memory", "args": {}}},
+            {"db": "postgresql://db", "objstorage": {"cls": "memory"}},
         ),
         ("filter", FilteringProxyStorage, {"storage": {"cls": "memory"}}),
         ("buffer", BufferingProxyStorage, {"storage": {"cls": "memory"}}),
@@ -64,7 +64,7 @@
 
     """
     with pytest.raises(ValueError, match="Unknown storage class `unknown`"):
-        get_storage("unknown", args=[])
+        get_storage("unknown")
 
 
 def test_get_storage_pipeline():
@@ -123,11 +123,7 @@
     mock_pool.ThreadedConnectionPool.return_value = None
     check_backend_check_config(
         monkeypatch,
-        {
-            "cls": "local",
-            "db": "postgresql://db",
-            "objstorage": {"cls": "memory", "args": {}},
-        },
+        {"cls": "local", "db": "postgresql://db", "objstorage": {"cls": "memory"}},
         backend_storage_cls=DbStorage,
     )