diff --git a/src/proto/identity/ClaimsIdentityRpc.proto b/src/proto/identity/ClaimsIdentityRpc.proto
index b921961..c3945bb 100644
--- a/src/proto/identity/ClaimsIdentityRpc.proto
+++ b/src/proto/identity/ClaimsIdentityRpc.proto
@@ -1,6 +1,8 @@
 syntax = "proto3";
 // protobuf vscode extension: https://marketplace.visualstudio.com/items?itemName=zxh404.vscode-proto3
 
+option java_package = "com.microsoft.azure.functions.rpc.messages";
+
 import "shared/NullableTypes.proto";
 
 // Light-weight representation of a .NET System.Security.Claims.ClaimsIdentity object.
diff --git a/src/proto/shared/NullableTypes.proto b/src/proto/shared/NullableTypes.proto
index 5178610..4fb4765 100644
--- a/src/proto/shared/NullableTypes.proto
+++ b/src/proto/shared/NullableTypes.proto
@@ -1,6 +1,8 @@
 syntax = "proto3";
 // protobuf vscode extension: https://marketplace.visualstudio.com/items?itemName=zxh404.vscode-proto3
 
+option java_package = "com.microsoft.azure.functions.rpc.messages";
+
 import "google/protobuf/timestamp.proto";
 
 message NullableString {