diff --git a/Day13/Functions/requirements.txt b/Day13/Functions/requirements.txt
index 8dfffb9..62058ad 100644
--- a/Day13/Functions/requirements.txt
+++ b/Day13/Functions/requirements.txt
@@ -18,7 +18,7 @@ MarkupSafe==1.1.1
 mock==3.0.5
 numpy==1.21.0
 opt-einsum==3.1.0
-protobuf==3.11.1
+protobuf==3.15.0
 PyYAML==5.4
 scikit-learn==0.22
 scipy==1.3.3