diff --git a/MNIST/requirements.txt b/MNIST/requirements.txt
index 6b5eaa3..680334c 100644
--- a/MNIST/requirements.txt
+++ b/MNIST/requirements.txt
@@ -16,7 +16,7 @@ Markdown==3.1.1
 MarkupSafe==1.1.1
 numpy==1.16.4
 Pillow==6.0.0
-protobuf==3.8.0
+protobuf==3.18.3
 PyYAML==5.1.1
 scipy==1.3.0
 six==1.12.0