diff --git a/code/keras/requirements.txt b/code/keras/requirements.txt
index 69e944b..9563996 100644
--- a/code/keras/requirements.txt
+++ b/code/keras/requirements.txt
@@ -12,7 +12,7 @@ Keras-Preprocessing==1.1.0
 Markdown==3.1.1
 numpy==1.17.2
 Pillow==6.1.0
-protobuf==3.9.1
+protobuf==3.18.3
 PyYAML==5.1.2
 scipy==0.18.1
 six==1.12.0