diff --git a/requirements.txt b/requirements.txt
index 7c44942..b91adf8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ Markdown==3.0.1
 matplotlib==3.0.2
 numpy==1.15.4
 opencv-python==3.4.5.20
-protobuf==3.6.1
+protobuf==3.18.3
 pyparsing==2.3.0
 python-dateutil==2.7.5
 PyYAML==3.13