diff --git a/serial/problem.yml b/serial/problem.yml
index bfbb8c1..d782b2f 100644
--- a/serial/problem.yml
+++ b/serial/problem.yml
@@ -4,3 +4,5 @@ value: 300
 hint: 010100110110010101110010011010010110000101101100001011100010111000101110
 author: wiresboy
 autogen: false
+files:
+  - serial.wav
\ No newline at end of file