diff --git a/mulch/cmd/repl/repl.go b/mulch/cmd/repl/repl.go
index 4fc9f0890..f7a0b1969 100644
--- a/mulch/cmd/repl/repl.go
+++ b/mulch/cmd/repl/repl.go
@@ -1,11 +1,11 @@
 package main
 
 import (
-	"bufio"
 	"fmt"
 	"mulch"
 	"mulch/lisp"
-	"os"
+
+	"github.com/chzyer/readline"
 )
 
 // Need persistent datastructures for env
@@ -16,15 +16,26 @@ func main() {
 
 func repl() {
 	fmt.Println("read")
-	in := bufio.NewReader(os.Stdin)
-	input := ""
+	// in := bufio.NewReader(os.Stdin)
+	// input := ""
+	rl, err := readline.New("> ")
+	if err != nil {
+		panic(err)
+	}
+	defer rl.Close()
 
 	// var e E = emptyEnv()
-	for input != "." {
-		input, err := in.ReadString('\n')
-		if err != nil {
-			panic(err)
+	// for input != "." {
+
+	for {
+		input, err := rl.Readline()
+		if err != nil { // io.EOF
+			break
 		}
+		// input, err := in.ReadString('\n')
+		// if err != nil {
+		// 	panic(err)
+		// }
 		source, err := lisp.Parse(input)
 		if err != nil {
 			fmt.Printf("failed to parse input: %s", err.Error())
diff --git a/mulch/go.mod b/mulch/go.mod
index 213293e9f..3c35e385e 100644
--- a/mulch/go.mod
+++ b/mulch/go.mod
@@ -5,10 +5,12 @@ go 1.20
 require github.com/tj/assert v0.0.3
 
 require (
+	github.com/chzyer/readline v1.5.1 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/iancoleman/strcase v0.3.0 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/stretchr/testify v1.6.1 // indirect
 	golang.org/x/exp v0.0.0-20230817173708-d852ddb80c63 // indirect
+	golang.org/x/sys v0.11.0 // indirect
 	gopkg.in/yaml.v3 v3.0.0-20200605160147-a5ece683394c // indirect
 )
diff --git a/mulch/go.sum b/mulch/go.sum
index 69b52afa9..28ad64323 100644
--- a/mulch/go.sum
+++ b/mulch/go.sum
@@ -1,3 +1,7 @@
+github.com/chzyer/logex v1.2.1/go.mod h1:JLbx6lG2kDbNRFnfkgvh4eRJRPX1QCoOIWomwysCBrQ=
+github.com/chzyer/readline v1.5.1 h1:upd/6fQk4src78LMRzh5vItIt361/o4uq553V8B5sGI=
+github.com/chzyer/readline v1.5.1/go.mod h1:Eh+b79XXUwfKfcPLepksvw2tcLE/Ct21YObkaSkeBlk=
+github.com/chzyer/test v1.0.0/go.mod h1:2JlltgoNkt4TW/z9V/IzDdFaMTM2JPIi26O1pF38GC8=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 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=
@@ -12,6 +16,9 @@ github.com/tj/assert v0.0.3 h1:Df/BlaZ20mq6kuai7f5z2TvPFiwC3xaWJSDQNiIS3Rk=
 github.com/tj/assert v0.0.3/go.mod h1:Ne6X72Q+TB1AteidzQncjw9PabbMp4PBMZ1k+vd1Pvk=
 golang.org/x/exp v0.0.0-20230817173708-d852ddb80c63 h1:m64FZMko/V45gv0bNmrNYoDEq8U5YUhetc9cBWKS1TQ=
 golang.org/x/exp v0.0.0-20230817173708-d852ddb80c63/go.mod h1:0v4NqG35kSWCMzLaMeX+IQrlSnVE/bqGSyC2cz/9Le8=
+golang.org/x/sys v0.0.0-20220310020820-b874c991c1a5/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.11.0 h1:eG7RXZHdqOJ1i+0lgLgCpSXAp6M3LYlAo6osgSi0xOM=
+golang.org/x/sys v0.11.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=