diff --git a/cmd/packserver/go.mod b/cmd/packserver/go.mod
index 10723a9..937784c 100644
--- a/cmd/packserver/go.mod
+++ b/cmd/packserver/go.mod
@@ -1,15 +1,8 @@
 module src.lwithers.me.uk/go/htpack/cmd/packserver
 
-go 1.19
+go 1.13
 
 require (
-	github.com/spf13/cobra v1.6.1
-	src.lwithers.me.uk/go/htpack v1.3.2
-)
-
-require (
-	github.com/gogo/protobuf v1.3.2 // indirect
-	github.com/inconshreveable/mousetrap v1.0.1 // indirect
-	github.com/spf13/pflag v1.0.5 // indirect
-	golang.org/x/sys v0.2.0 // indirect
+	github.com/spf13/cobra v1.5.0
+	src.lwithers.me.uk/go/htpack v1.3.1
 )
diff --git a/cmd/packserver/go.sum b/cmd/packserver/go.sum
index 9fd4201..ae7ff43 100644
--- a/cmd/packserver/go.sum
+++ b/cmd/packserver/go.sum
@@ -1,13 +1,13 @@
 github.com/cpuguy83/go-md2man/v2 v2.0.2/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/gogo/protobuf v1.3.2 h1:Ov1cvc58UF3b5XjBnZv7+opcTcQFZebYjWzi34vdm4Q=
 github.com/gogo/protobuf v1.3.2/go.mod h1:P1XiOD3dCwIKUDQYPy72D8LYyHL2YPYrpS2s69NZV8Q=
-github.com/inconshreveable/mousetrap v1.0.1 h1:U3uMjPSQEBMNp1lFxmllqCPM6P5u/Xq7Pgzkat/bFNc=
-github.com/inconshreveable/mousetrap v1.0.1/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
+github.com/inconshreveable/mousetrap v1.0.0 h1:Z8tu5sraLXCXIcARxBp/8cbvlwVa7Z1NHg9XEKhtSvM=
+github.com/inconshreveable/mousetrap v1.0.0/go.mod h1:PxqpIevigyE2G7u3NXJIT2ANytuPF1OarO4DADm73n8=
 github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
-github.com/spf13/cobra v1.6.1 h1:o94oiPyS4KD1mPy2fmcYYHHfCxLqYjJOhGsCHFZtEzA=
-github.com/spf13/cobra v1.6.1/go.mod h1:IOw/AERYS7UzyrGinqmz6HLUo219MORXGxhbaJUqzrY=
+github.com/spf13/cobra v1.5.0 h1:X+jTBEBqF0bHN+9cSMgmfuvv2VHJ9ezmFNf9Y/XstYU=
+github.com/spf13/cobra v1.5.0/go.mod h1:dWXEIy2H428czQCjInthrTRUg7yKbok+2Qi/yBIJoUM=
 github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
 github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
 github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
@@ -27,8 +27,8 @@ golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.2.0 h1:ljd4t30dBnAvMZaQCevtY0xLLD0A+bRZXbgLMLU1F/A=
-golang.org/x/sys v0.2.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220704084225-05e143d24a9e h1:CsOuNlbOuf0mzxJIefr6Q4uAUetRUwZE4qt7VfzP+xo=
+golang.org/x/sys v0.0.0-20220704084225-05e143d24a9e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
@@ -40,6 +40,6 @@ golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8T
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-src.lwithers.me.uk/go/htpack v1.3.2 h1:WyJs0F1lHKMoDTY+HgDUS0mTcdFMGbq2CykJwgm5rkI=
-src.lwithers.me.uk/go/htpack v1.3.2/go.mod h1:rslOJzSAJTKf0fz+iULoYF+jXrffRJK5PwUNu1wADOk=
+gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
+src.lwithers.me.uk/go/htpack v1.3.1 h1:JvCeyVnrOjUOL//D9N/ctTOwobf60AuNU828G6WXf2M=
+src.lwithers.me.uk/go/htpack v1.3.1/go.mod h1:wpfOXweUh8oRPxYnVjUWDRNNwIXlAlsOrmGWc0fOls4=
diff --git a/cmd/packserver/main.go b/cmd/packserver/main.go
index 2000102..c18b90b 100644
--- a/cmd/packserver/main.go
+++ b/cmd/packserver/main.go
@@ -5,17 +5,12 @@ package main
 
 import (
 	"bufio"
-	"context"
 	"errors"
 	"fmt"
 	"net/http"
 	"os"
-	"os/signal"
 	"path/filepath"
 	"strings"
-	"sync/atomic"
-	"syscall"
-	"time"
 
 	"github.com/spf13/cobra"
 	"src.lwithers.me.uk/go/htpack"
@@ -58,8 +53,6 @@ func main() {
 		"Name of file to return if response would be 404 (spa.html or similar)")
 	rootCmd.Flags().String("frames", "sameorigin",
 		"Override X-Frame-Options header (can be sameorigin, deny, allow)")
-	rootCmd.Flags().Duration("graceful-shutdown-delay", 3*time.Second,
-		"Number of seconds to wait after receiving SIGTERM before initiating graceful shutdown")
 
 	if err := rootCmd.Execute(); err != nil {
 		fmt.Fprintln(os.Stderr, err)
@@ -158,15 +151,6 @@ func run(c *cobra.Command, args []string) error {
 		return err
 	}
 
-	// graceful shutdown delay must be > 0
-	gracefulShutdownDelay, err := c.Flags().GetDuration("graceful-shutdown-delay")
-	if err != nil {
-		return err
-	}
-	if gracefulShutdownDelay <= 0 {
-		return errors.New("graceful shutdown delay must be > 0s")
-	}
-
 	// verify .htpack specifications
 	if len(args) == 0 {
 		return errors.New("must specify one or more .htpack files")
@@ -192,7 +176,6 @@ func run(c *cobra.Command, args []string) error {
 	}
 
 	// load packfiles, registering handlers as we go
-	var handler http.Handler
 	for prefix, packfile := range packPaths {
 		packHandler, err := htpack.New(packfile)
 		if err != nil {
@@ -207,58 +190,26 @@ func run(c *cobra.Command, args []string) error {
 		}
 		packHandler.SetHeader("X-Frame-Options", framesHeader)
 
-		handler = &addHeaders{
+		handler := &addHeaders{
 			extraHeaders: extraHeaders,
 			handler:      packHandler,
 		}
 
 		if prefix != "/" {
-			handler = http.StripPrefix(prefix, handler)
+			http.Handle(prefix+"/",
+				http.StripPrefix(prefix, handler))
+		} else {
+			http.Handle("/", handler)
 		}
 	}
 
-	// HTTP server object setup
-	sv := &http.Server{
-		Addr:    bindAddr,
-		Handler: handler,
-	}
-
-	// register SIGINT, SIGTERM handler
-	sigch := make(chan os.Signal, 1)
-	signal.Notify(sigch, syscall.SIGINT, syscall.SIGTERM)
-	var (
-		// if we are shut down by a signal, then http.ListenAndServe()
-		// returns straight away, but we actually need to wait for
-		// Shutdown() to complete prior to returning / exiting
-		isSignalled atomic.Bool
-		signalDone  = make(chan struct{})
-	)
-	go func() {
-		<-sigch
-		time.Sleep(gracefulShutdownDelay)
-		isSignalled.Store(true)
-		shutctx, shutcancel := context.WithTimeout(context.Background(), gracefulShutdownDelay)
-		sv.Shutdown(shutctx)
-		shutcancel()
-		close(signalDone)
-	}()
-
 	// main server loop
 	if keyFile == "" {
-		err = sv.ListenAndServe()
+		err = http.ListenAndServe(bindAddr, nil)
 	} else {
-		err = sv.ListenAndServeTLS(certFile, keyFile)
+		err = http.ListenAndServeTLS(bindAddr, certFile, keyFile, nil)
 	}
-
-	// if we were shut down by a signal, wait for Shutdown() to return
-	if isSignalled.Load() {
-		<-signalDone
-	}
-
-	switch err {
-	case nil, http.ErrServerClosed:
-		// OK
-	default:
+	if err != nil {
 		fmt.Fprintln(os.Stderr, err)
 		os.Exit(1)
 	}