diff --git a/protos/backend_service.proto b/protos/backend_service.proto
index 34b6cfe..ed96fa8 100644
--- a/protos/backend_service.proto
+++ b/protos/backend_service.proto
@@ -5,7 +5,7 @@ syntax = "proto3";
 
 package durabletask.protos.backend.v1;
 
-option csharp_namespace = "Microsoft.DurableTask.Protobuf";
+option csharp_namespace = "Dapr.DurableTask.Protobuf";
 option java_package = "io.dapr.durabletask.implementation.protobuf";
 option go_package = "/api/protos";
 
diff --git a/protos/orchestrator_service.proto b/protos/orchestrator_service.proto
index 90d7f91..a5333c6 100644
--- a/protos/orchestrator_service.proto
+++ b/protos/orchestrator_service.proto
@@ -3,7 +3,7 @@
 
 syntax = "proto3";
 
-option csharp_namespace = "Microsoft.DurableTask.Protobuf";
+option csharp_namespace = "Dapr.DurableTask.Protobuf";
 option java_package = "io.dapr.durabletask.implementation.protobuf";
 option go_package = "/api/protos";
 
diff --git a/protos/runtime_state.proto b/protos/runtime_state.proto
index 0c53ade..76adde7 100644
--- a/protos/runtime_state.proto
+++ b/protos/runtime_state.proto
@@ -15,7 +15,7 @@ syntax = "proto3";
 
 package durabletask.protos.backend.v1;
 
-option csharp_namespace = "Microsoft.DurableTask.Protobuf";
+option csharp_namespace = "Dapr.DurableTask.Protobuf";
 option java_package = "io.dapr.durabletask.implementation.protobuf";
 option go_package = "/api/protos";