diff --git a/requirements.txt b/requirements.txt
index f3dd6ca..9f946f6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -38,7 +38,7 @@ numpy==1.18.1
 opt-einsum==3.1.0
 pandas==1.0.1
 Pillow==6.2.2
-protobuf==3.11.3
+protobuf==3.18.3
 psutil==5.8.0
 py3nvml==0.2.5
 pycodestyle==2.5.0