diff --git a/tap_aggregator/build.rs b/tap_aggregator/build.rs
index 8e1d93a..9e7a986 100644
--- a/tap_aggregator/build.rs
+++ b/tap_aggregator/build.rs
@@ -1,3 +1,6 @@
+// Copyright 2023-, Semiotic AI, Inc.
+// SPDX-License-Identifier: Apache-2.0
+
 fn main() -> Result<(), Box<dyn std::error::Error>> {
     println!("Running build.rs...");
     let out_dir = std::env::var("OUT_DIR").expect("OUT_DIR not set by Cargo");
diff --git a/tap_aggregator/proto/tap_aggregator.proto b/tap_aggregator/proto/tap_aggregator.proto
index 6f98294..b4301ea 100644
--- a/tap_aggregator/proto/tap_aggregator.proto
+++ b/tap_aggregator/proto/tap_aggregator.proto
@@ -1,3 +1,8 @@
+
+// Copyright 2023-, Semiotic AI, Inc.
+// SPDX-License-Identifier: Apache-2.0
+
+
 syntax = "proto3";
 package tap_aggregator.v1;
 
diff --git a/tap_aggregator/src/grpc.rs b/tap_aggregator/src/grpc.rs
index eef9f83..bcc7e27 100644
--- a/tap_aggregator/src/grpc.rs
+++ b/tap_aggregator/src/grpc.rs
@@ -1,3 +1,6 @@
+// Copyright 2023-, Semiotic AI, Inc.
+// SPDX-License-Identifier: Apache-2.0
+
 use anyhow::anyhow;
 use tap_core::signed_message::EIP712SignedMessage;
 
diff --git a/tap_aggregator/tests/aggregate_test.rs b/tap_aggregator/tests/aggregate_test.rs
index 9790767..e752197 100644
--- a/tap_aggregator/tests/aggregate_test.rs
+++ b/tap_aggregator/tests/aggregate_test.rs
@@ -1,3 +1,6 @@
+// Copyright 2023-, Semiotic AI, Inc.
+// SPDX-License-Identifier: Apache-2.0
+
 use std::{collections::HashSet, str::FromStr};
 
 use alloy::{primitives::Address, signers::local::PrivateKeySigner};