diff --git a/requirements.txt b/requirements.txt
index b110198..f1ebede 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -40,7 +40,7 @@ pandas==0.24.2
 patsy==0.5.1
 pexpect==4.7.0
 pluggy==0.12.0
-protobuf==3.8.0
+protobuf==3.18.3
 ptyprocess==0.6.0
 py==1.8.0
 pydot==1.4.1