diff --git a/requirements.txt b/requirements.txt
index 1044888..5768a5e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -40,7 +40,7 @@ opt-einsum==3.2.1
 pandas==1.0.3
 Pillow==6.2.0
 pkg-resources==0.0.0
-protobuf==3.12.1
+protobuf==3.15.0
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
 pyparsing==2.4.7