diff --git a/build/requirements.txt b/build/requirements.txt
index b2cc897..5912bb9 100644
--- a/build/requirements.txt
+++ b/build/requirements.txt
@@ -32,7 +32,7 @@ opencv-python==4.1.2.30
 opt-einsum==3.1.0
 pandas==1.0.1
 Pillow==7.0.0
-protobuf==3.11.2
+protobuf==3.15.0
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
 pycodestyle==2.5.0