diff --git a/go.mod b/go.mod
index 3f1eded..e762e06 100644
--- a/go.mod
+++ b/go.mod
@@ -5,7 +5,7 @@ go 1.20
 require (
 	github.com/FloatTech/ttl v0.0.0-20250224045156-012b1463287d
 	github.com/fumiama/orbyte v0.0.0-20251002065953-3bb358367eb5
-	github.com/fumiama/terasu v0.0.0-20251003064740-9974bdca12ab
+	github.com/fumiama/terasu v0.0.0-20251003142749-f6efbe4b619b
 	github.com/sirupsen/logrus v1.9.3
 )
 
diff --git a/go.sum b/go.sum
index 48ea8da..9afd996 100644
--- a/go.sum
+++ b/go.sum
@@ -7,8 +7,8 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/fumiama/orbyte v0.0.0-20251002065953-3bb358367eb5 h1:j9o0XVvdAeLwrBYMnh0SerrMc9CgNU6AGszbsvFzoc0=
 github.com/fumiama/orbyte v0.0.0-20251002065953-3bb358367eb5/go.mod h1:FOjdw7KdCbK2eH3gRPhwFNCoXKpu9sN5vPH4El/8e0c=
-github.com/fumiama/terasu v0.0.0-20251003064740-9974bdca12ab h1:PPc1fEgQzQJKl2n9DtiAP0e5DDoRpLSe7780m74K174=
-github.com/fumiama/terasu v0.0.0-20251003064740-9974bdca12ab/go.mod h1:ltlQhbPE0423K0bNQxJdhtkYgFxXstUobc8k+9LFY88=
+github.com/fumiama/terasu v0.0.0-20251003142749-f6efbe4b619b h1:rlBZX9DLT4Qcp3LS2fMfSjDcWu0FEOeXMsnjLUygjDQ=
+github.com/fumiama/terasu v0.0.0-20251003142749-f6efbe4b619b/go.mod h1:ltlQhbPE0423K0bNQxJdhtkYgFxXstUobc8k+9LFY88=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/sirupsen/logrus v1.9.3 h1:dueUQJ1C2q9oE3F7wvmSGAaVtTmUizReu6fjN8uqzbQ=
diff --git a/main.go b/main.go
index 7e79603..8ae075c 100644
--- a/main.go
+++ b/main.go
@@ -34,8 +34,8 @@ var (
 )
 
 func main() {
-	iphost := flag.String("l", "0.0.0.0:53", "listen DNS UDP port")
-	fbsrv := flag.String("fb", "127.0.0.1:5345", "fallback to DNS UDP port")
+	iphost := flag.String("l", "127.0.0.1:5345", "listen DNS UDP port")
+	fbsrv := flag.String("fb", "127.0.0.1:53", "fallback to DNS UDP port")
 	flag.BoolVar(&forcefb, "ffb", false, "force using fallback")
 	frag := flag.Uint("frag", 3, "TLS first fragemt size")
 	flag.Parse()