diff --git a/go.mod b/go.mod
index 16a10a1..d44cb56 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,7 @@ module github.com/mjl-/mox
 go 1.21
 
 require (
-	github.com/mjl-/adns v0.0.0-20240308133139-6bfb89c3f854
+	github.com/mjl-/adns v0.0.0-20240309142737-2a1aacf346dc
 	github.com/mjl-/autocert v0.0.0-20231214125928-31b7400acb05
 	github.com/mjl-/bstore v0.0.4
 	github.com/mjl-/sconf v0.0.5
diff --git a/go.sum b/go.sum
index 1d8cfbd..59dbcff 100644
--- a/go.sum
+++ b/go.sum
@@ -24,8 +24,8 @@ github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515/go.mod h1:+0opPa2QZZtGFB
 github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5Ld7szi9bcBfOoFv/3dc6xSMkL2PC0=
 github.com/matttproud/golang_protobuf_extensions/v2 v2.0.0 h1:jWpvCLoY8Z/e3VKvlsiIGKtc+UG6U5vzxaoagmhXfyg=
 github.com/matttproud/golang_protobuf_extensions/v2 v2.0.0/go.mod h1:QUyp042oQthUoa9bqDv0ER0wrtXnBruoNd7aNjkbP+k=
-github.com/mjl-/adns v0.0.0-20240308133139-6bfb89c3f854 h1:BeYqeRkulstKKKCdzk7IOYNeuJPhqmLnaMhu69GxQUs=
-github.com/mjl-/adns v0.0.0-20240308133139-6bfb89c3f854/go.mod h1:v47qUMJnipnmDTRGaHwpCwzE6oypa5K33mUvBfzZBn8=
+github.com/mjl-/adns v0.0.0-20240309142737-2a1aacf346dc h1:ghTx3KsrO0hSJW0bCFCGwjSrYeXZ6Bj5hdv9FTTFV4M=
+github.com/mjl-/adns v0.0.0-20240309142737-2a1aacf346dc/go.mod h1:v47qUMJnipnmDTRGaHwpCwzE6oypa5K33mUvBfzZBn8=
 github.com/mjl-/autocert v0.0.0-20231214125928-31b7400acb05 h1:s6ay4bh4tmpPLdxjyeWG45mcwHfEluBMuGPkqxHWUJ4=
 github.com/mjl-/autocert v0.0.0-20231214125928-31b7400acb05/go.mod h1:taMFU86abMxKLPV4Bynhv8enbYmS67b8LG80qZv2Qus=
 github.com/mjl-/bstore v0.0.4 h1:q+R1oAr8+E9yf9q+zxkVjQ18VFqD/E9KmGVoe4FIOBA=
diff --git a/vendor/github.com/mjl-/adns/hook_plan9.go b/vendor/github.com/mjl-/adns/hook_plan9.go
deleted file mode 100644
index 6020d32..0000000
--- a/vendor/github.com/mjl-/adns/hook_plan9.go
+++ /dev/null
@@ -1,9 +0,0 @@
-// Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package net
-
-var (
-	hostsFilePath = "/etc/hosts"
-)
diff --git a/vendor/modules.txt b/vendor/modules.txt
index d755dd5..47d6724 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -7,7 +7,7 @@ github.com/cespare/xxhash/v2
 # github.com/matttproud/golang_protobuf_extensions/v2 v2.0.0
 ## explicit; go 1.19
 github.com/matttproud/golang_protobuf_extensions/v2/pbutil
-# github.com/mjl-/adns v0.0.0-20240308133139-6bfb89c3f854
+# github.com/mjl-/adns v0.0.0-20240309142737-2a1aacf346dc
 ## explicit; go 1.20
 github.com/mjl-/adns
 github.com/mjl-/adns/internal/bytealg