diff --git a/requirements.txt b/requirements.txt
index 34515ef..722049f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -47,7 +47,7 @@ pbr==1.9.1
 pexpect==3.1
 Pillow==3.4.1
 piston-mini-client==0.7.5
-protobuf==2.5.0
+protobuf==3.15.0
 psycopg2==2.4.5
 pycrypto==2.6.1
 pycups==1.9.66