diff --git a/diffie-cult/problem.yml b/diffie-cult/problem.yml
index dabda4e..0fb7ea4 100644
--- a/diffie-cult/problem.yml
+++ b/diffie-cult/problem.yml
@@ -6,4 +6,4 @@ autogen: false
 programming: false
 value: 50
 files:
-	- messages.txt
\ No newline at end of file
+  - messages.txt