diff --git a/12.1-TensorFlow_2.0/09-Deployment/requirements.txt b/12.1-TensorFlow_2.0/09-Deployment/requirements.txt
index 21ee021..5568957 100644
--- a/12.1-TensorFlow_2.0/09-Deployment/requirements.txt
+++ b/12.1-TensorFlow_2.0/09-Deployment/requirements.txt
@@ -24,7 +24,7 @@ MarkupSafe==1.1.1
 numpy==1.17.4
 oauthlib==3.1.0
 opt-einsum==3.1.0
-protobuf==3.11.1
+protobuf==3.18.3
 pyasn1==0.4.8
 pyasn1-modules==0.2.7
 requests==2.22.0