diff --git a/requirements.txt b/requirements.txt
index 93eb868..c0bd807 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -31,7 +31,7 @@ opencv-contrib-python==4.1.0.25
 opencv-python==4.1.0.25
 Pillow==6.0.0
 plotly==3.8.1
-protobuf==3.7.1
+protobuf==3.18.3
 pycodestyle==2.5.0
 pylint==2.3.1
 pyrsistent==0.14.11