diff --git a/requirements.txt b/requirements.txt
index f92d3d7..f4ef069 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -35,7 +35,7 @@ Paste==3.0.6
 PasteDeploy==2.0.1
 pexpect==4.2.1
 Pillow==5.1.0
-protobuf==3.0.0
+protobuf==3.15.0
 pyasn1==0.4.5
 pyasn1-modules==0.2.3
 pycairo==1.16.2