diff --git a/utils.go b/utils.go
index 15b2134..f612d00 100644
--- a/utils.go
+++ b/utils.go
@@ -51,7 +51,7 @@ var (
 	reReplaceSpecialChars   = regexp.MustCompile(`(?m)[^a-zA-Z0-9_\-.]`)
 	reReplaceUnderscore     = regexp.MustCompile(`(?m)[_\-]{2,}`)
 	reReplaceTree           = regexp.MustCompile(`(?m)^tree$`)
-	reReplacePacsiftWarning = regexp.MustCompile(`^warning:.*\n`)
+	reReplacePacsiftWarning = regexp.MustCompile(`(?m)^warning:.*\n`)
 )
 
 type Conf struct {