diff --git a/pyproxy/requirements.txt b/pyproxy/requirements.txt
index 92456304..a3210c03 100644
--- a/pyproxy/requirements.txt
+++ b/pyproxy/requirements.txt
@@ -14,7 +14,7 @@ mock>=2.0.0
 numpy
 paste==2.0.3
 pip
-protobuf==3.0.0a3
+protobuf==3.15.0
 pyeclib==1.4.0
 pytest==2.9.2
 redis==2.10.5