diff --git a/service/src/main/proto/PubSubMessage.proto b/service/src/main/proto/PubSubMessage.proto
index 036f43953..de8dd31db 100644
--- a/service/src/main/proto/PubSubMessage.proto
+++ b/service/src/main/proto/PubSubMessage.proto
@@ -1,19 +1,9 @@
 /**
- * Copyright (C) 2014 Open Whisper Systems
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * Copyright 2014 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
  */
+syntax = "proto2";
+
 package textsecure;
 
 option java_package = "org.whispersystems.textsecuregcm.storage";
diff --git a/service/src/main/proto/TextSecure.proto b/service/src/main/proto/TextSecure.proto
index 978f8118c..bae56dde3 100644
--- a/service/src/main/proto/TextSecure.proto
+++ b/service/src/main/proto/TextSecure.proto
@@ -1,19 +1,9 @@
 /**
- * Copyright (C) 2013 - 2015 Open WhisperSystems
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ * Copyright 2013 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
  */
+syntax = "proto2";
+
 package textsecure;
 
 option java_package = "org.whispersystems.textsecuregcm.entities";