diff --git a/requirements.txt b/requirements.txt
index 0158797..33db61c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -43,7 +43,7 @@ pandas==1.0.5
 plac==1.1.3
 pluggy==0.13.1
 preshed==3.0.2
-protobuf==3.12.2
+protobuf==3.15.0
 py==1.9.0
 pyasn1==0.4.8
 pyasn1-modules==0.2.8