diff --git a/requirements.txt b/requirements.txt
index 2d7d93f..f9a424d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,7 +24,7 @@ Markdown==3.1.1
 numpy==1.18.1
 oauthlib==3.1.0
 opt-einsum==3.1.0
-protobuf==3.11.2
+protobuf==3.18.3
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
 python-dateutil==2.8.1