diff --git a/requirements.txt b/requirements.txt
index 68ce77e..bdec66e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,7 +18,7 @@ Markdown==3.1.1
 numpy==1.17.3
 oauthlib==3.1.0
 opt-einsum==3.1.0
-protobuf==3.10.0
+protobuf==3.18.3
 pyasn1==0.4.7
 pyasn1-modules==0.2.7
 requests==2.22.0