diff --git a/prune.go b/prune.go
index eb19c1e..7866e99 100644
--- a/prune.go
+++ b/prune.go
@@ -41,6 +41,7 @@ var DefaultFiles = []string{
 	"CONTRIBUTORS",
 	".yarn-integrity",
 	".yarnclean",
+	"_config.yml"
 }
 
 // DefaultDirectories pruned.