diff --git a/requirements.txt b/requirements.txt
index 832bdf2..a84951f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,7 +22,7 @@ oauthlib==3.1.0
 opt-einsum==3.2.1
 pandas==1.0.3
 pathlib==1.0.1
-protobuf==3.15.0
+protobuf==3.18.3
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
 python-dateutil==2.8.1