diff --git a/lib/ucoin/registry/community/members.py b/lib/ucoin/registry/community/members.py
index f3aa6e62cdaf9e35ccef880c47e67017304cfd42..4b8d5bd47d9a92f34342eef306c1184526134994 100644
--- a/lib/ucoin/registry/community/members.py
+++ b/lib/ucoin/registry/community/members.py
@@ -14,13 +14,13 @@
 #
 #
 
-from .. import Registry
+from . import Base
 from .. import logging
 
 logger = logging.getLogger("ucoin/registry/community")
 
 
-class Current(Registry):
+class Current(Base):
     """GET the last valid membership document for member pgp_fingerprint"""
 
     def __init__(self, pgp_fingerprint=None, server=None, port=None):
@@ -40,7 +40,7 @@ class Current(Registry):
                                  **kwargs).json()
 
 
-class History(Registry):
+class History(Base):
     """GET the all received and stored membership documents"""
 
     def __init__(self, pgp_fingerprint=None, server=None, port=None):
diff --git a/lib/ucoin/registry/community/voters.py b/lib/ucoin/registry/community/voters.py
index 9f403502f137772bba3cf67b4b4039542efdc3bc..4a0420645ef2500de81a80821b09ff90842ef67b 100644
--- a/lib/ucoin/registry/community/voters.py
+++ b/lib/ucoin/registry/community/voters.py
@@ -14,17 +14,11 @@
 #
 #
 
-from .. import Registry
+from . import Base
 from .. import logging
 
 logger = logging.getLogger("ucoin/registry/community")
 
-
-class Base(Registry):
-    def __init__(self, server=None, port=None):
-        super().__init__('hdc/registry/community', server, port)
-
-
 class Current(Base):
     """GET the last valid membership document for member pgp_fingerprint"""
 
@@ -36,7 +30,7 @@ class Current(Base):
         - `number`: amendment number
         """
 
-        super().__init__(server, port)
+        super().__init__(server=server, port=port)
 
         self.pgp_fingerprint = pgp_fingerprint
 
@@ -56,7 +50,7 @@ class History(Base):
         - `number`: amendment number
         """
 
-        super().__init__(server, port)
+        super().__init__(server=server, port=port)
 
         self.pgp_fingerprint = pgp_fingerprint