diff --git a/requirements.txt b/requirements.txt
index 989dbaf..5acb3a0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,7 +11,7 @@ pandas==0.25.0
 pickleshare==0.7.5
 Pillow==6.2.0
 prompt-toolkit==2.0.9
-protobuf==3.9.1
+protobuf==3.18.3
 scikit-learn==0.21.3
 scipy==1.3.1
 six==1.12.0