diff --git a/harness/determined/ipc.py b/harness/determined/ipc.py
index d59f9ccd3f1..b9a7eef20f3 100644
--- a/harness/determined/ipc.py
+++ b/harness/determined/ipc.py
@@ -95,7 +95,7 @@ def __init__(
     ) -> None:
         self._num_connections = num_connections
 
-        context = zmq.Context()
+        context = zmq.Context()  # type: ignore
 
         self._pub_socket = context.socket(zmq.PUB)
         self._pull_socket = context.socket(zmq.PULL)
@@ -179,7 +179,7 @@ def _recv_one(self) -> Tuple[Any, type]:
 
 class ZMQBroadcastClient:
     def __init__(self, srv_pub_url: str, srv_pull_url: str) -> None:
-        context = zmq.Context()
+        context = zmq.Context()  # type: ignore
 
         self._sub_socket = context.socket(zmq.SUB)
         # Subscriber always listens to ALL messages.
@@ -245,7 +245,7 @@ def __init__(
         ports: Optional[List[int]] = None,
         port_range: Optional[Tuple[int, int]] = None,
     ) -> None:
-        self.context = zmq.Context()
+        self.context = zmq.Context()  # type: ignore
         self.sockets = []  # type: List[zmq.Socket]
         self.ports = []  # type: List[int]
 
@@ -297,11 +297,11 @@ def get_ports(self) -> List[int]:
 
     def send(self, py_obj: Any) -> None:
         for socket in self.sockets:
-            socket.send_pyobj(py_obj)
+            socket.send_pyobj(py_obj)  # type: ignore
 
     def receive_blocking(self, send_rank: int) -> Any:
         check.lt(send_rank, len(self.sockets))
-        message = self.sockets[send_rank].recv_pyobj()
+        message = self.sockets[send_rank].recv_pyobj()  # type: ignore
         return message
 
     def receive_non_blocking(
@@ -311,9 +311,9 @@ def receive_non_blocking(
         timeout = 1000 if not deadline else int(deadline - time.time()) * 1000
         timeout = max(timeout, 100)
 
-        if self.sockets[send_rank].poll(timeout) == 0:
+        if self.sockets[send_rank].poll(timeout) == 0:  # type: ignore
             return False, None
-        message = self.sockets[send_rank].recv_pyobj()
+        message = self.sockets[send_rank].recv_pyobj()  # type: ignore
         return True, message
 
     def barrier(
@@ -341,13 +341,13 @@ def barrier(
 
             check.is_instance(barrier_message, _OneSidedBarrier)
             messages.append(barrier_message.message)
-            self.sockets[0].send_pyobj(_OneSidedBarrier(message=message))
+            self.sockets[0].send_pyobj(_OneSidedBarrier(message=message))  # type: ignore
 
         return messages
 
     def close(self) -> None:
         for socket in self.sockets:
-            socket.close()
+            socket.close()  # type: ignore
 
 
 class ZMQClient:
@@ -358,7 +358,7 @@ class ZMQClient:
     """
 
     def __init__(self, ip_address: str, port: int) -> None:
-        self.context = zmq.Context()
+        self.context = zmq.Context()  # type: ignore
         self.socket = self.context.socket(zmq.REQ)
         self.socket.connect(f"tcp://{ip_address}:{port}")
 
diff --git a/requirements.txt b/requirements.txt
index 1cc1554088d..8c1ab56fa2f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -21,3 +21,5 @@ isort==4.3.21
 # pytest 6.0 is based on mypy 0.780
 mypy==0.780
 bump2version>=1.0.0
+# Earlier versions had different type annotations
+pyzmq>=22