diff --git a/requirements-swh.txt b/requirements-swh.txt
--- a/requirements-swh.txt
+++ b/requirements-swh.txt
@@ -1,4 +1,4 @@
-swh.core >= 0.0.44
+swh.core >= 0.0.56
 swh.model >= 0.0.27
 swh.objstorage >= 0.0.17
 swh.scheduler >= 0.0.39
diff --git a/swh/vault/api/client.py b/swh/vault/api/client.py
--- a/swh/vault/api/client.py
+++ b/swh/vault/api/client.py
@@ -7,20 +7,9 @@
 from swh.core.api import SWHRemoteAPI
 
 
-class VaultAPIError(Exception):
-    """Vault API Error"""
-    def __str__(self):
-        return ('An unexpected error occurred in the Vault backend: {}'
-                .format(self.args))
-
-
 class RemoteVaultClient(SWHRemoteAPI):
     """Client to the Software Heritage vault cache."""
 
-    def __init__(self, url, timeout=None):
-        super().__init__(
-            api_exception=VaultAPIError, url=url, timeout=timeout)
-
     # Web API endpoints
 
     def fetch(self, obj_type, obj_id):