diff --git a/.lycheeignore b/.lycheeignore
index 45e028fec3..a744932f5c 100644
--- a/.lycheeignore
+++ b/.lycheeignore
@@ -9,4 +9,6 @@
 ^https://chrome\.google\.com/webstore/detail/yomitan/likgccmbimhjbgkjambclfkhldnlhbnn$
 ^https://chrome\.google\.com/webstore/detail/yomitan-development-build/glnaenfapkkecknnmginabpmgkenenml$
 ^https://forvo\.com/$
-^https://code.visualstudio.com/docs/languages/json#_json-schemas-and-settings$
\ No newline at end of file
+^https://code.visualstudio.com/docs/languages/json#_json-schemas-and-settings$
+^https://pixabay.com/sound-effects/error-8-206492/$
+^https://pixabay.com/service/license-summary/$
\ No newline at end of file
diff --git a/README.md b/README.md
index 480bcd032b..2b499f7966 100644
--- a/README.md
+++ b/README.md
@@ -111,3 +111,7 @@ Yomitan uses several third-party libraries to function.
 | parse5              | 7.1.2             | MIT          | git://github.com/inikulin/parse5.git             |
 | wanakana            | 5.3.1             | MIT          | git+ssh://git@github.com/WaniKani/WanaKana.git   |
 | hangul.js           | 0.2.6             | MIT          | git+https://github.com/e-/Hangul.js.git          |
+
+## Attribution
+
+`button.mp3` is provided by [UNIVERSFIELD](https://pixabay.com/sound-effects/error-8-206492/) and licensed under the [Pixabay Content License](https://pixabay.com/service/license-summary/).
diff --git a/ext/data/audio/button.mp3 b/ext/data/audio/button.mp3
index 7a9728d1c8..1b69267915 100644
Binary files a/ext/data/audio/button.mp3 and b/ext/data/audio/button.mp3 differ