diff --git a/requirements.txt b/requirements.txt
index a522c68..689230b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,7 +24,7 @@ opencv-python==4.1.2.30
 opt-einsum==3.1.0
 pandas==0.25.3
 Pillow==6.2.1
-protobuf==3.11.2
+protobuf==3.15.0
 pyasn1==0.4.8
 pyasn1-modules==0.2.7
 python-dateutil==2.8.1