diff --git a/lychee.toml b/lychee.toml
index e66bc3e04..149ab9572 100644
--- a/lychee.toml
+++ b/lychee.toml
@@ -9,7 +9,7 @@ no_progress = true
 
 # Path to summary output file.
 output = ".config.dummy.report.md"
-format = "Markdown"
+format = "markdown"
 
 #############################  Cache  ###############################