diff --git a/requirements.txt b/requirements.txt
index 1bec9cc..90d09e5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -40,7 +40,7 @@ numpy==1.18.0
 oauthlib==3.1.0
 opt-einsum==3.1.0
 pandas==0.25.3
-protobuf==3.11.2
+protobuf==3.18.3
 pyasn1==0.4.8
 pyasn1-modules==0.2.7
 pyparsing==2.4.6