diff --git a/01-dapr/requirements.txt b/01-dapr/requirements.txt
index 380c92f..6ca2009 100644
--- a/01-dapr/requirements.txt
+++ b/01-dapr/requirements.txt
@@ -8,7 +8,7 @@ fire==0.4.0
 grpcio==1.37.1
 idna==2.10
 multidict==5.1.0
-protobuf==3.15.0
+protobuf==3.18.3
 python-dateutil==2.8.1
 requests==2.25.1
 six==1.15.0