diff --git a/example-dns-01-nsupdate-script.md b/example-dns-01-nsupdate-script.md
index c33c12a..faacdd0 100644
--- a/example-dns-01-nsupdate-script.md
+++ b/example-dns-01-nsupdate-script.md
@@ -8,7 +8,7 @@ This hook script uses the nsupdate utility from the bind package to solve dns-01
 #!/usr/bin/env bash
 
 #
-# Example how to deploy a DNS challange using nsupdate
+# Example how to deploy a DNS challenge using nsupdate
 #
 
 set -e