diff --git a/ATTRIBUTION.md b/ATTRIBUTION.md
index 04fbee9c76..8fb37ffc3e 100644
--- a/ATTRIBUTION.md
+++ b/ATTRIBUTION.md
@@ -45,3 +45,4 @@ FairEmail uses:
 * [LeakCanary](https://github.com/square/leakcanary). Copyright 2015 Square, Inc. [Apache License 2.0](https://github.com/square/leakcanary/blob/main/LICENSE.txt).
 * [IPAddress](https://github.com/seancfoley/IPAddress). Copyright 2016-2018 Sean C Foley. [Apache License 2.0](https://github.com/seancfoley/IPAddress/blob/master/LICENSE).
 * [MaterialDings](https://github.com/Accusoft/MaterialDings). Copyright (c) 2018 Accusoft Corporation. [MIT License](https://github.com/Accusoft/MaterialDings/blob/master/LICENSE.md).
+* [Send](https://github.com/timvisee/send). [Mozilla Public License 2.0](https://github.com/timvisee/send/blob/master/LICENSE).
diff --git a/app/src/main/assets/ATTRIBUTION.md b/app/src/main/assets/ATTRIBUTION.md
index 04fbee9c76..8fb37ffc3e 100644
--- a/app/src/main/assets/ATTRIBUTION.md
+++ b/app/src/main/assets/ATTRIBUTION.md
@@ -45,3 +45,4 @@ FairEmail uses:
 * [LeakCanary](https://github.com/square/leakcanary). Copyright 2015 Square, Inc. [Apache License 2.0](https://github.com/square/leakcanary/blob/main/LICENSE.txt).
 * [IPAddress](https://github.com/seancfoley/IPAddress). Copyright 2016-2018 Sean C Foley. [Apache License 2.0](https://github.com/seancfoley/IPAddress/blob/master/LICENSE).
 * [MaterialDings](https://github.com/Accusoft/MaterialDings). Copyright (c) 2018 Accusoft Corporation. [MIT License](https://github.com/Accusoft/MaterialDings/blob/master/LICENSE.md).
+* [Send](https://github.com/timvisee/send). [Mozilla Public License 2.0](https://github.com/timvisee/send/blob/master/LICENSE).