diff --git a/electrumx/server/controller.py b/electrumx/server/controller.py
index 6c449b6..2a173b9 100644
--- a/electrumx/server/controller.py
+++ b/electrumx/server/controller.py
@@ -82,8 +82,8 @@ class Controller(ServerBase):
         '''Start the RPC server and wait for the mempool to synchronize.  Then
         start serving external clients.
         '''
-        if not (0, 15, 0) <= aiorpcx_version < (0, 16):
-            raise RuntimeError('aiorpcX version 0.15.x is required')
+        if not (0, 16, 0) <= aiorpcx_version < (0, 17):
+            raise RuntimeError('aiorpcX version 0.16.x is required')
 
         env = self.env
         min_str, max_str = env.coin.SESSIONCLS.protocol_min_max_strings()
diff --git a/electrumx/server/session.py b/electrumx/server/session.py
index e375978..45a1839 100644
--- a/electrumx/server/session.py
+++ b/electrumx/server/session.py
@@ -25,7 +25,7 @@ import attr
 from aiorpcx import (
     RPCSession, JSONRPCAutoDetect, JSONRPCConnection,
     TaskGroup, handler_invocation, RPCError, Request, sleep, Event,
-    ExcessiveSessionCostError, FinalRPCError
+    ExcessiveSessionCostError, ReplyAndDisconnect
 )
 
 import electrumx
@@ -1257,8 +1257,8 @@ class ElectrumX(SessionBase):
             client_name = str(client_name)
             if self.env.drop_client is not None and \
                     self.env.drop_client.match(client_name):
-                raise FinalRPCError(BAD_REQUEST,
-                                    f'unsupported client: {client_name}')
+                raise ReplyAndDisconnect(RPCError(
+                    BAD_REQUEST, f'unsupported client: {client_name}'))
             self.client = client_name[:17]
 
         # Find the highest common protocol version.  Disconnect if
@@ -1273,8 +1273,8 @@ class ElectrumX(SessionBase):
                 self.logger.info(f'client requested future protocol version '
                                  f'{util.version_string(client_min)} '
                                  f'- is your software out of date?')
-            raise FinalRPCError(BAD_REQUEST,
-                                f'unsupported protocol version: {protocol_version}')
+            raise ReplyAndDisconnect(RPCError(
+                BAD_REQUEST, f'unsupported protocol version: {protocol_version}'))
         self.set_request_handlers(ptuple)
 
         return (electrumx.version, self.protocol_version_string())
diff --git a/setup.py b/setup.py
index 87091cc..7083497 100644
--- a/setup.py
+++ b/setup.py
@@ -6,8 +6,7 @@ setuptools.setup(
     version=version,
     scripts=['electrumx_server', 'electrumx_rpc', 'electrumx_compact_history'],
     python_requires='>=3.6',
-    # via environment variables, in which case I've tested with 15.0.4
-    install_requires=['aiorpcX>=0.15.0,<0.16', 'attrs',
+    install_requires=['aiorpcX>=0.16.0,<0.17', 'attrs',
                       'plyvel', 'pylru', 'aiohttp>=3.3'],
     extras_require={
         'rocksdb': ['python-rocksdb>=0.6.9'],