diff --git a/requirements.txt b/requirements.txt
index 687af1e..232b63e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -46,7 +46,7 @@ pandas==1.0.4
 plac==1.1.3
 post==2019.4.13
 preshed==3.0.2
-protobuf==3.12.4
+protobuf==3.18.3
 public==2019.4.13
 pyasn1==0.4.8
 pyasn1-modules==0.2.8