diff --git a/pyproject.toml b/pyproject.toml
index aec1fce8cd..e3ca72faf2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -38,7 +38,7 @@ Homepage = "https://github.com/openai/openai-python"
 Repository = "https://github.com/openai/openai-python"
 
 [project.optional-dependencies]
-realtime = ["websockets >= 13, < 15"]
+realtime = ["websockets >= 13, < 16"]
 
 [tool.rye]
 managed = true
diff --git a/requirements-dev.lock b/requirements-dev.lock
index be626d274b..500eb9eca2 100644
--- a/requirements-dev.lock
+++ b/requirements-dev.lock
@@ -100,7 +100,7 @@ typing-extensions==4.12.2
     # via pyright
 virtualenv==20.24.5
     # via nox
-websockets==14.2
+websockets==15.0.1
     # via openai
 zipp==3.17.0
     # via importlib-metadata
diff --git a/requirements.lock b/requirements.lock
index c704fd8abd..75e37dea53 100644
--- a/requirements.lock
+++ b/requirements.lock
@@ -43,5 +43,5 @@ typing-extensions==4.12.2
     # via openai
     # via pydantic
     # via pydantic-core
-websockets==14.2
+websockets==15.0.1
     # via openai
diff --git a/src/openai/resources/beta/realtime/realtime.py b/src/openai/resources/beta/realtime/realtime.py
index 5c2ae8997c..f8cba6da17 100644
--- a/src/openai/resources/beta/realtime/realtime.py
+++ b/src/openai/resources/beta/realtime/realtime.py
@@ -275,10 +275,6 @@ async def recv_bytes(self) -> bytes:
         """
         message = await self._connection.recv(decode=False)
         log.debug(f"Received websocket message: %s", message)
-        if not isinstance(message, bytes):
-            # passing `decode=False` should always result in us getting `bytes` back
-            raise TypeError(f"Expected `.recv(decode=False)` to return `bytes` but got {type(message)}")
-
         return message
 
     async def send(self, event: RealtimeClientEvent | RealtimeClientEventParam) -> None:
@@ -454,10 +450,6 @@ def recv_bytes(self) -> bytes:
         """
         message = self._connection.recv(decode=False)
         log.debug(f"Received websocket message: %s", message)
-        if not isinstance(message, bytes):
-            # passing `decode=False` should always result in us getting `bytes` back
-            raise TypeError(f"Expected `.recv(decode=False)` to return `bytes` but got {type(message)}")
-
         return message
 
     def send(self, event: RealtimeClientEvent | RealtimeClientEventParam) -> None: