diff --git a/.github/workflows/build-protocol.yml b/.github/workflows/build-protocol.yml
index 4be795cc..18e90e6f 100644
--- a/.github/workflows/build-protocol.yml
+++ b/.github/workflows/build-protocol.yml
@@ -36,7 +36,7 @@ jobs:
       - uses: actions/setup-python@v4
 
       - name: Install Protoc
-        uses: arduino/setup-protoc@v2
+        uses: arduino/setup-protoc@v3
         with:
           version: "25.1"
           repo-token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/build-rtc.yml b/.github/workflows/build-rtc.yml
index f43d534f..876a53c3 100644
--- a/.github/workflows/build-rtc.yml
+++ b/.github/workflows/build-rtc.yml
@@ -38,12 +38,12 @@ jobs:
       - name: Install Protoc
         uses: arduino/setup-protoc@v3
         with:
-          version: "26.x"
+          version: "25.1"
           repo-token: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Install deps
         run: |
-          pip3 install mypy-protobuf==3.6.0
+          pip3 install mypy-protobuf==3.6.0 "protobuf>=4.25.0,<5.0.0"
 
       - name: generate python stubs
         run: ./generate_proto.sh
diff --git a/livekit-rtc/livekit/rtc/_proto/audio_frame_pb2.py b/livekit-rtc/livekit/rtc/_proto/audio_frame_pb2.py
index b4007e96..8b11da4c 100644
--- a/livekit-rtc/livekit/rtc/_proto/audio_frame_pb2.py
+++ b/livekit-rtc/livekit/rtc/_proto/audio_frame_pb2.py
@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 # Generated by the protocol buffer compiler.  DO NOT EDIT!
 # source: audio_frame.proto
-# Protobuf Python Version: 5.26.1
+# Protobuf Python Version: 4.25.1
 """Generated protocol buffer code."""
 from google.protobuf import descriptor as _descriptor
 from google.protobuf import descriptor_pool as _descriptor_pool
@@ -21,8 +21,8 @@
 _globals = globals()
 _builder.BuildMessageAndEnumDescriptors(DESCRIPTOR, _globals)
 _builder.BuildTopDescriptorsAndMessages(DESCRIPTOR, 'audio_frame_pb2', _globals)
-if not _descriptor._USE_C_DESCRIPTORS:
-  _globals['DESCRIPTOR']._loaded_options = None
+if _descriptor._USE_C_DESCRIPTORS == False:
+  _globals['DESCRIPTOR']._options = None
   _globals['DESCRIPTOR']._serialized_options = b'\252\002\rLiveKit.Proto'
   _globals['_SOXRESAMPLERDATATYPE']._serialized_start=4262
   _globals['_SOXRESAMPLERDATATYPE']._serialized_end=4336
diff --git a/livekit-rtc/livekit/rtc/_proto/e2ee_pb2.py b/livekit-rtc/livekit/rtc/_proto/e2ee_pb2.py
index 482deb8a..0b5f8554 100644
--- a/livekit-rtc/livekit/rtc/_proto/e2ee_pb2.py
+++ b/livekit-rtc/livekit/rtc/_proto/e2ee_pb2.py
@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 # Generated by the protocol buffer compiler.  DO NOT EDIT!
 # source: e2ee.proto
-# Protobuf Python Version: 5.26.1
+# Protobuf Python Version: 4.25.1
 """Generated protocol buffer code."""
 from google.protobuf import descriptor as _descriptor
 from google.protobuf import descriptor_pool as _descriptor_pool
@@ -19,8 +19,8 @@
 _globals = globals()
 _builder.BuildMessageAndEnumDescriptors(DESCRIPTOR, _globals)
 _builder.BuildTopDescriptorsAndMessages(DESCRIPTOR, 'e2ee_pb2', _globals)
-if not _descriptor._USE_C_DESCRIPTORS:
-  _globals['DESCRIPTOR']._loaded_options = None
+if _descriptor._USE_C_DESCRIPTORS == False:
+  _globals['DESCRIPTOR']._options = None
   _globals['DESCRIPTOR']._serialized_options = b'\252\002\rLiveKit.Proto'
   _globals['_ENCRYPTIONTYPE']._serialized_start=2856
   _globals['_ENCRYPTIONTYPE']._serialized_end=2903
diff --git a/livekit-rtc/livekit/rtc/_proto/ffi_pb2.py b/livekit-rtc/livekit/rtc/_proto/ffi_pb2.py
index 659b299b..0b009bbc 100644
--- a/livekit-rtc/livekit/rtc/_proto/ffi_pb2.py
+++ b/livekit-rtc/livekit/rtc/_proto/ffi_pb2.py
@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 # Generated by the protocol buffer compiler.  DO NOT EDIT!
 # source: ffi.proto
-# Protobuf Python Version: 5.26.1
+# Protobuf Python Version: 4.25.1
 """Generated protocol buffer code."""
 from google.protobuf import descriptor as _descriptor
 from google.protobuf import descriptor_pool as _descriptor_pool
@@ -26,8 +26,8 @@
 _globals = globals()
 _builder.BuildMessageAndEnumDescriptors(DESCRIPTOR, _globals)
 _builder.BuildTopDescriptorsAndMessages(DESCRIPTOR, 'ffi_pb2', _globals)
-if not _descriptor._USE_C_DESCRIPTORS:
-  _globals['DESCRIPTOR']._loaded_options = None
+if _descriptor._USE_C_DESCRIPTORS == False:
+  _globals['DESCRIPTOR']._options = None
   _globals['DESCRIPTOR']._serialized_options = b'\252\002\rLiveKit.Proto'
   _globals['_LOGLEVEL']._serialized_start=9392
   _globals['_LOGLEVEL']._serialized_end=9475
diff --git a/livekit-rtc/livekit/rtc/_proto/handle_pb2.py b/livekit-rtc/livekit/rtc/_proto/handle_pb2.py
index 98d253b4..2ae2db78 100644
--- a/livekit-rtc/livekit/rtc/_proto/handle_pb2.py
+++ b/livekit-rtc/livekit/rtc/_proto/handle_pb2.py
@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 # Generated by the protocol buffer compiler.  DO NOT EDIT!
 # source: handle.proto
-# Protobuf Python Version: 5.26.1
+# Protobuf Python Version: 4.25.1
 """Generated protocol buffer code."""
 from google.protobuf import descriptor as _descriptor
 from google.protobuf import descriptor_pool as _descriptor_pool
@@ -19,8 +19,8 @@
 _globals = globals()
 _builder.BuildMessageAndEnumDescriptors(DESCRIPTOR, _globals)
 _builder.BuildTopDescriptorsAndMessages(DESCRIPTOR, 'handle_pb2', _globals)
-if not _descriptor._USE_C_DESCRIPTORS:
-  _globals['DESCRIPTOR']._loaded_options = None
+if _descriptor._USE_C_DESCRIPTORS == False:
+  _globals['DESCRIPTOR']._options = None
   _globals['DESCRIPTOR']._serialized_options = b'\252\002\rLiveKit.Proto'
   _globals['_FFIOWNEDHANDLE']._serialized_start=31
   _globals['_FFIOWNEDHANDLE']._serialized_end=59
diff --git a/livekit-rtc/livekit/rtc/_proto/participant_pb2.py b/livekit-rtc/livekit/rtc/_proto/participant_pb2.py
index b4425bd1..4a2ef4ed 100644
--- a/livekit-rtc/livekit/rtc/_proto/participant_pb2.py
+++ b/livekit-rtc/livekit/rtc/_proto/participant_pb2.py
@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 # Generated by the protocol buffer compiler.  DO NOT EDIT!
 # source: participant.proto
-# Protobuf Python Version: 5.26.1
+# Protobuf Python Version: 4.25.1
 """Generated protocol buffer code."""
 from google.protobuf import descriptor as _descriptor
 from google.protobuf import descriptor_pool as _descriptor_pool
@@ -20,10 +20,10 @@
 _globals = globals()
 _builder.BuildMessageAndEnumDescriptors(DESCRIPTOR, _globals)
 _builder.BuildTopDescriptorsAndMessages(DESCRIPTOR, 'participant_pb2', _globals)
-if not _descriptor._USE_C_DESCRIPTORS:
-  _globals['DESCRIPTOR']._loaded_options = None
+if _descriptor._USE_C_DESCRIPTORS == False:
+  _globals['DESCRIPTOR']._options = None
   _globals['DESCRIPTOR']._serialized_options = b'\252\002\rLiveKit.Proto'
-  _globals['_PARTICIPANTINFO_ATTRIBUTESENTRY']._loaded_options = None
+  _globals['_PARTICIPANTINFO_ATTRIBUTESENTRY']._options = None
   _globals['_PARTICIPANTINFO_ATTRIBUTESENTRY']._serialized_options = b'8\001'
   _globals['_PARTICIPANTKIND']._serialized_start=472
   _globals['_PARTICIPANTKIND']._serialized_end=633
diff --git a/livekit-rtc/livekit/rtc/_proto/room_pb2.py b/livekit-rtc/livekit/rtc/_proto/room_pb2.py
index 57baa54d..bf34ff21 100644
--- a/livekit-rtc/livekit/rtc/_proto/room_pb2.py
+++ b/livekit-rtc/livekit/rtc/_proto/room_pb2.py
@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 # Generated by the protocol buffer compiler.  DO NOT EDIT!
 # source: room.proto
-# Protobuf Python Version: 5.26.1
+# Protobuf Python Version: 4.25.1
 """Generated protocol buffer code."""
 from google.protobuf import descriptor as _descriptor
 from google.protobuf import descriptor_pool as _descriptor_pool
@@ -25,14 +25,14 @@
 _globals = globals()
 _builder.BuildMessageAndEnumDescriptors(DESCRIPTOR, _globals)
 _builder.BuildTopDescriptorsAndMessages(DESCRIPTOR, 'room_pb2', _globals)
-if not _descriptor._USE_C_DESCRIPTORS:
-  _globals['DESCRIPTOR']._loaded_options = None
+if _descriptor._USE_C_DESCRIPTORS == False:
+  _globals['DESCRIPTOR']._options = None
   _globals['DESCRIPTOR']._serialized_options = b'\252\002\rLiveKit.Proto'
-  _globals['_PUBLISHDATAREQUEST'].fields_by_name['destination_sids']._loaded_options = None
+  _globals['_PUBLISHDATAREQUEST'].fields_by_name['destination_sids']._options = None
   _globals['_PUBLISHDATAREQUEST'].fields_by_name['destination_sids']._serialized_options = b'\030\001'
-  _globals['_DATASTREAM_HEADER_ATTRIBUTESENTRY']._loaded_options = None
+  _globals['_DATASTREAM_HEADER_ATTRIBUTESENTRY']._options = None
   _globals['_DATASTREAM_HEADER_ATTRIBUTESENTRY']._serialized_options = b'8\001'
-  _globals['_DATASTREAM_TRAILER_ATTRIBUTESENTRY']._loaded_options = None
+  _globals['_DATASTREAM_TRAILER_ATTRIBUTESENTRY']._options = None
   _globals['_DATASTREAM_TRAILER_ATTRIBUTESENTRY']._serialized_options = b'8\001'
   _globals['_ICETRANSPORTTYPE']._serialized_start=12048
   _globals['_ICETRANSPORTTYPE']._serialized_end=12128
diff --git a/livekit-rtc/livekit/rtc/_proto/rpc_pb2.py b/livekit-rtc/livekit/rtc/_proto/rpc_pb2.py
index 1b6302cd..eeb1f9ff 100644
--- a/livekit-rtc/livekit/rtc/_proto/rpc_pb2.py
+++ b/livekit-rtc/livekit/rtc/_proto/rpc_pb2.py
@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 # Generated by the protocol buffer compiler.  DO NOT EDIT!
 # source: rpc.proto
-# Protobuf Python Version: 5.26.1
+# Protobuf Python Version: 4.25.1
 """Generated protocol buffer code."""
 from google.protobuf import descriptor as _descriptor
 from google.protobuf import descriptor_pool as _descriptor_pool
@@ -19,8 +19,8 @@
 _globals = globals()
 _builder.BuildMessageAndEnumDescriptors(DESCRIPTOR, _globals)
 _builder.BuildTopDescriptorsAndMessages(DESCRIPTOR, 'rpc_pb2', _globals)
-if not _descriptor._USE_C_DESCRIPTORS:
-  _globals['DESCRIPTOR']._loaded_options = None
+if _descriptor._USE_C_DESCRIPTORS == False:
+  _globals['DESCRIPTOR']._options = None
   _globals['DESCRIPTOR']._serialized_options = b'\252\002\rLiveKit.Proto'
   _globals['_RPCERROR']._serialized_start=28
   _globals['_RPCERROR']._serialized_end=83
diff --git a/livekit-rtc/livekit/rtc/_proto/stats_pb2.py b/livekit-rtc/livekit/rtc/_proto/stats_pb2.py
index 2cbdb1cd..ce7b411c 100644
--- a/livekit-rtc/livekit/rtc/_proto/stats_pb2.py
+++ b/livekit-rtc/livekit/rtc/_proto/stats_pb2.py
@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 # Generated by the protocol buffer compiler.  DO NOT EDIT!
 # source: stats.proto
-# Protobuf Python Version: 5.26.1
+# Protobuf Python Version: 4.25.1
 """Generated protocol buffer code."""
 from google.protobuf import descriptor as _descriptor
 from google.protobuf import descriptor_pool as _descriptor_pool
@@ -19,10 +19,10 @@
 _globals = globals()
 _builder.BuildMessageAndEnumDescriptors(DESCRIPTOR, _globals)
 _builder.BuildTopDescriptorsAndMessages(DESCRIPTOR, 'stats_pb2', _globals)
-if not _descriptor._USE_C_DESCRIPTORS:
-  _globals['DESCRIPTOR']._loaded_options = None
+if _descriptor._USE_C_DESCRIPTORS == False:
+  _globals['DESCRIPTOR']._options = None
   _globals['DESCRIPTOR']._serialized_options = b'\252\002\rLiveKit.Proto'
-  _globals['_OUTBOUNDRTPSTREAMSTATS_QUALITYLIMITATIONDURATIONSENTRY']._loaded_options = None
+  _globals['_OUTBOUNDRTPSTREAMSTATS_QUALITYLIMITATIONDURATIONSENTRY']._options = None
   _globals['_OUTBOUNDRTPSTREAMSTATS_QUALITYLIMITATIONDURATIONSENTRY']._serialized_options = b'8\001'
   _globals['_DATACHANNELSTATE']._serialized_start=9282
   _globals['_DATACHANNELSTATE']._serialized_end=9363
diff --git a/livekit-rtc/livekit/rtc/_proto/track_pb2.py b/livekit-rtc/livekit/rtc/_proto/track_pb2.py
index 5e3d1691..1fc2984b 100644
--- a/livekit-rtc/livekit/rtc/_proto/track_pb2.py
+++ b/livekit-rtc/livekit/rtc/_proto/track_pb2.py
@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 # Generated by the protocol buffer compiler.  DO NOT EDIT!
 # source: track.proto
-# Protobuf Python Version: 5.26.1
+# Protobuf Python Version: 4.25.1
 """Generated protocol buffer code."""
 from google.protobuf import descriptor as _descriptor
 from google.protobuf import descriptor_pool as _descriptor_pool
@@ -22,8 +22,8 @@
 _globals = globals()
 _builder.BuildMessageAndEnumDescriptors(DESCRIPTOR, _globals)
 _builder.BuildTopDescriptorsAndMessages(DESCRIPTOR, 'track_pb2', _globals)
-if not _descriptor._USE_C_DESCRIPTORS:
-  _globals['DESCRIPTOR']._loaded_options = None
+if _descriptor._USE_C_DESCRIPTORS == False:
+  _globals['DESCRIPTOR']._options = None
   _globals['DESCRIPTOR']._serialized_options = b'\252\002\rLiveKit.Proto'
   _globals['_TRACKKIND']._serialized_start=1743
   _globals['_TRACKKIND']._serialized_end=1804
diff --git a/livekit-rtc/livekit/rtc/_proto/track_publication_pb2.py b/livekit-rtc/livekit/rtc/_proto/track_publication_pb2.py
index 22a19081..32d23be6 100644
--- a/livekit-rtc/livekit/rtc/_proto/track_publication_pb2.py
+++ b/livekit-rtc/livekit/rtc/_proto/track_publication_pb2.py
@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 # Generated by the protocol buffer compiler.  DO NOT EDIT!
 # source: track_publication.proto
-# Protobuf Python Version: 5.26.1
+# Protobuf Python Version: 4.25.1
 """Generated protocol buffer code."""
 from google.protobuf import descriptor as _descriptor
 from google.protobuf import descriptor_pool as _descriptor_pool
@@ -19,8 +19,8 @@
 _globals = globals()
 _builder.BuildMessageAndEnumDescriptors(DESCRIPTOR, _globals)
 _builder.BuildTopDescriptorsAndMessages(DESCRIPTOR, 'track_publication_pb2', _globals)
-if not _descriptor._USE_C_DESCRIPTORS:
-  _globals['DESCRIPTOR']._loaded_options = None
+if _descriptor._USE_C_DESCRIPTORS == False:
+  _globals['DESCRIPTOR']._options = None
   _globals['DESCRIPTOR']._serialized_options = b'\252\002\rLiveKit.Proto'
   _globals['_ENABLEREMOTETRACKPUBLICATIONREQUEST']._serialized_start=42
   _globals['_ENABLEREMOTETRACKPUBLICATIONREQUEST']._serialized_end=130
diff --git a/livekit-rtc/livekit/rtc/_proto/video_frame_pb2.py b/livekit-rtc/livekit/rtc/_proto/video_frame_pb2.py
index bcbd99e9..8dbc3805 100644
--- a/livekit-rtc/livekit/rtc/_proto/video_frame_pb2.py
+++ b/livekit-rtc/livekit/rtc/_proto/video_frame_pb2.py
@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 # Generated by the protocol buffer compiler.  DO NOT EDIT!
 # source: video_frame.proto
-# Protobuf Python Version: 5.26.1
+# Protobuf Python Version: 4.25.1
 """Generated protocol buffer code."""
 from google.protobuf import descriptor as _descriptor
 from google.protobuf import descriptor_pool as _descriptor_pool
@@ -21,8 +21,8 @@
 _globals = globals()
 _builder.BuildMessageAndEnumDescriptors(DESCRIPTOR, _globals)
 _builder.BuildTopDescriptorsAndMessages(DESCRIPTOR, 'video_frame_pb2', _globals)
-if not _descriptor._USE_C_DESCRIPTORS:
-  _globals['DESCRIPTOR']._loaded_options = None
+if _descriptor._USE_C_DESCRIPTORS == False:
+  _globals['DESCRIPTOR']._options = None
   _globals['DESCRIPTOR']._serialized_options = b'\252\002\rLiveKit.Proto'
   _globals['_VIDEOCODEC']._serialized_start=2452
   _globals['_VIDEOCODEC']._serialized_end=2501
diff --git a/livekit-rtc/setup.py b/livekit-rtc/setup.py
index 71ec85f4..7cf1508c 100644
--- a/livekit-rtc/setup.py
+++ b/livekit-rtc/setup.py
@@ -58,7 +58,7 @@ def finalize_options(self):
     license="Apache-2.0",
     packages=setuptools.find_namespace_packages(include=["livekit.*"]),
     python_requires=">=3.9.0",
-    install_requires=["protobuf>=5.26.1", "types-protobuf>=3", "aiofiles>=24"],
+    install_requires=["protobuf>=4.25.0", "types-protobuf>=3", "aiofiles>=24"],
     package_data={
         "livekit.rtc": ["_proto/*.py", "py.typed", "*.pyi", "**/*.pyi"],
         "livekit.rtc.resources": ["*.so", "*.dylib", "*.dll", "LICENSE.md", "*.h"],