diff --git a/requirements.txt b/requirements.txt
index a635269..1545e09 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ humanfriendly==7.1.1
 joblib==0.14.1
 numpy==1.18.1
 prefetch-generator==1.0.1
-protobuf==3.11.3
+protobuf==3.18.3
 PySnooper==0.3.0
 scikit-learn==0.22.1
 scipy==1.4.1