diff --git a/requirements.txt b/requirements.txt
index d974099..131ac83 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ enum34==1.1.2; python_version < '3.4'
 gevent==1.1.0
 mock==1.3.0
 nose==1.3.7
-protobuf==3.0.0b2
+protobuf==3.0.0b4
 cryptography==1.3
 PyYAML==3.11
 requests==2.9.1
diff --git a/setup.py b/setup.py
index a86c050..6c646fe 100644
--- a/setup.py
+++ b/setup.py
@@ -23,7 +23,7 @@ install_requires = [
 install_extras = {
     'client': [
         'gevent>=1.1.0',
-        'protobuf>=3.0.0b2',
+        'protobuf>=3.0.0b4',
         'gevent-eventemitter>=1.4',
     ],
 }