diff --git a/installers/charm/osm-ro/src/charm.py b/installers/charm/osm-ro/src/charm.py
index e112d4c..84c0ee3 100755
--- a/installers/charm/osm-ro/src/charm.py
+++ b/installers/charm/osm-ro/src/charm.py
@@ -31,6 +31,7 @@
 import logging
 from typing import Any, Dict
 
+from charms.data_platform_libs.v0.data_interfaces import DatabaseRequires
 from charms.kafka_k8s.v0.kafka import KafkaEvents, KafkaRequires
 from charms.observability_libs.v1.kubernetes_service_patch import KubernetesServicePatch
 from charms.osm_libs.v0.utils import (
@@ -47,8 +48,6 @@
 from ops.main import main
 from ops.model import ActiveStatus, Container
 
-from legacy_interfaces import MongoClient
-
 ro_host_paths = {
     "NG-RO": "/usr/lib/python3/dist-packages/osm_ng_ro",
     "RO-plugin": "/usr/lib/python3/dist-packages/osm_ro_plugin",
@@ -101,7 +100,7 @@
         super().__init__(*args)
         self._stored.set_default(certificates=set())
         self.kafka = KafkaRequires(self)
-        self.mongodb_client = MongoClient(self, "mongodb")
+        self.mongodb_client = DatabaseRequires(self, "mongodb", database_name="osm")
         self._observe_charm_events()
         self._patch_k8s_service()
         self.ro = RoProvides(self)
@@ -197,7 +196,7 @@
             # Relation events
             self.on.kafka_available: self._on_config_changed,
             self.on["kafka"].relation_broken: self._on_required_relation_broken,
-            self.on["mongodb"].relation_changed: self._on_config_changed,
+            self.mongodb_client.on.database_created: self._on_config_changed,
             self.on["mongodb"].relation_broken: self._on_required_relation_broken,
             self.on.ro_relation_joined: self._update_ro_relation,
             # Action events
@@ -207,6 +206,12 @@
         for event, handler in event_handler_mapping.items():
             self.framework.observe(event, handler)
 
+    def _is_database_available(self) -> bool:
+        try:
+            return self.mongodb_client.is_resource_created()
+        except KeyError:
+            return False
+
     def _validate_config(self) -> None:
         """Validate charm configuration.
 
@@ -241,7 +246,7 @@
 
         if not self.kafka.host or not self.kafka.port:
             missing_relations.append("kafka")
-        if self.mongodb_client.is_missing_data_in_unit():
+        if not self._is_database_available():
             missing_relations.append("mongodb")
 
         if missing_relations:
@@ -310,13 +315,13 @@
                         "OSMRO_MESSAGE_DRIVER": "kafka",
                         # Database configuration
                         "OSMRO_DATABASE_DRIVER": "mongo",
-                        "OSMRO_DATABASE_URI": self.mongodb_client.connection_string,
+                        "OSMRO_DATABASE_URI": self._get_mongodb_uri(),
                         "OSMRO_DATABASE_COMMONKEY": self.config["database-commonkey"],
                         # Storage configuration
                         "OSMRO_STORAGE_DRIVER": "mongo",
                         "OSMRO_STORAGE_PATH": "/app/storage",
                         "OSMRO_STORAGE_COLLECTION": "files",
-                        "OSMRO_STORAGE_URI": self.mongodb_client.connection_string,
+                        "OSMRO_STORAGE_URI": self._get_mongodb_uri(),
                         "OSMRO_PERIOD_REFRESH_ACTIVE": self.config.get("period_refresh_active")
                         or 60,
                     },
@@ -324,6 +329,9 @@
             },
         }
 
+    def _get_mongodb_uri(self):
+        return list(self.mongodb_client.fetch_relation_data().values())[0]["uris"]
+
 
 if __name__ == "__main__":  # pragma: no cover
     main(OsmRoCharm)