diff --git a/requirements.txt b/requirements.txt
index 378eb52..d8aa95f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -20,7 +20,7 @@ numpy==1.18.1
 oauthlib==3.1.0
 opt-einsum==3.1.0
 pandas==0.24.2
-protobuf==3.11.3
+protobuf==3.18.3
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
 pyparsing==2.4.6