diff --git a/requirements.txt b/requirements.txt
index 23a7401..d168ff0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,7 +13,7 @@ matplotlib==2.2.3
 numpy==1.14.5
 opencv-python==3.4.3.18
 ordered-set==3.1
-protobuf==3.6.1
+protobuf==3.18.3
 PyYAML==3.13
 scikit-learn==0.19.2
 scipy==1.1.0