diff --git a/requirements.txt b/requirements.txt
index ce64d09..bfee432 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -31,7 +31,7 @@ numpy==1.14.5
 opencv-python==4.0.0.21
 Pillow==5.4.1
 pluggy==0.8.1
-protobuf==3.6.1
+protobuf==3.15.0
 py==1.8.0
 pybase64==0.5.0
 pydot==1.4.1