diff --git a/go.mod b/go.mod
index a4b2733..3236905 100644
--- a/go.mod
+++ b/go.mod
@@ -5,15 +5,15 @@ go 1.20
 require (
 	github.com/charmbracelet/bubbles v0.16.1
 	github.com/charmbracelet/bubbletea v0.24.2
+	github.com/charmbracelet/lipgloss v0.7.1
 	github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510
 	github.com/posener/complete/v2 v2.0.1-alpha.13
-	mvdan.cc/sh/v3 v3.6.0
+	mvdan.cc/sh/v3 v3.7.0
 )
 
 require (
 	github.com/atotto/clipboard v0.1.4 // indirect
 	github.com/aymanbagabas/go-osc52/v2 v2.0.1 // indirect
-	github.com/charmbracelet/lipgloss v0.7.1 // indirect
 	github.com/containerd/console v1.0.4-0.20230313162750-1ae8d489ac81 // indirect
 	github.com/hashicorp/errwrap v1.1.0 // indirect
 	github.com/hashicorp/go-multierror v1.1.1 // indirect
@@ -28,8 +28,8 @@ require (
 	github.com/posener/script v1.1.5 // indirect
 	github.com/rivo/uniseg v0.2.0 // indirect
 	github.com/sahilm/fuzzy v0.1.0 // indirect
-	golang.org/x/sync v0.1.0 // indirect
-	golang.org/x/sys v0.6.0 // indirect
-	golang.org/x/term v0.6.0 // indirect
+	golang.org/x/sync v0.2.0 // indirect
+	golang.org/x/sys v0.8.0 // indirect
+	golang.org/x/term v0.8.0 // indirect
 	golang.org/x/text v0.3.8 // indirect
 )
diff --git a/go.sum b/go.sum
index d7063fb..7309751 100644
--- a/go.sum
+++ b/go.sum
@@ -14,6 +14,7 @@ github.com/creack/pty v1.1.18 h1:n56/Zwd5o6whRC5PMGretI4IdRLlmBXYNjScPaBgsbY=
 github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/frankban/quicktest v1.14.4 h1:g2rn0vABPOOXmZUj+vbmUp0lPoXEMuhTpIluN0XL9UY=
+github.com/frankban/quicktest v1.14.5 h1:dfYrrRyLtiqT9GyKXgdh+k4inNeTvmGbuSgZ3lx3GhA=
 github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
 github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510 h1:El6M4kTTCOh6aBiKaUGG7oYTSPP8MxqL4YI3kZKwcP4=
 github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510/go.mod h1:pupxD2MaaD3pAXIBCelhxNneeOaAeabZDe5s4K6zSpQ=
@@ -54,6 +55,7 @@ github.com/rivo/uniseg v0.1.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJ
 github.com/rivo/uniseg v0.2.0 h1:S1pD9weZBuJdFmowNwbpi7BJ8TNftyUImj/0WQi72jY=
 github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
 github.com/rogpeppe/go-internal v1.9.0 h1:73kH8U+JUqXU8lRuOHeVHaa/SZPifC7BkcraZVejAe8=
+github.com/rogpeppe/go-internal v1.10.1-0.20230524175051-ec119421bb97 h1:3RPlVWzZ/PDqmVuf/FKHARG5EMid/tl7cv54Sw/QRVY=
 github.com/sahilm/fuzzy v0.1.0 h1:FzWGaw2Opqyu+794ZQ9SYifWv2EIXpwP4q8dY1kDAwI=
 github.com/sahilm/fuzzy v0.1.0/go.mod h1:VFvziUEIMCrT6A6tw2RFIXPXXmzXbOsSHF0DOI8ZK9Y=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
@@ -61,15 +63,21 @@ github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJy
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
 golang.org/x/sync v0.1.0 h1:wsuoTGHzEhffawBOhz5CYhcrV4IdKZbEyZjBMuTp12o=
 golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.2.0 h1:PUR+T4wwASmuSTYdKjYHI5TD22Wy5ogLU5qZCOLxBrI=
+golang.org/x/sync v0.2.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.1.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.3.0 h1:w8ZOecv6NaNa/zC8944JTU3vz4u6Lagfk4RPQxv92NQ=
 golang.org/x/sys v0.3.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0 h1:MVltZSvRTcU2ljQOhs94SXPftV6DCNnZViHeQps87pQ=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.8.0 h1:EBmGv8NaZBZTWvrbjNoL6HVt+IVy3QDQpJs7VRIw3tU=
+golang.org/x/sys v0.8.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.3.0 h1:qoo4akIqOcDME5bhc/NgxUdovd6BSS2uMsVjB56q1xI=
 golang.org/x/term v0.3.0/go.mod h1:q750SLmJuPmVoN1blW3UFBPREJfb1KmY3vwxfr+nFDA=
 golang.org/x/term v0.6.0 h1:clScbb1cHjoCkyRbWwBEUZ5H/tIFu5TAXIqaZD0Gcjw=
 golang.org/x/term v0.6.0/go.mod h1:m6U89DPEgQRMq3DNkDClhWw02AUbt2daBVO4cn4Hv9U=
+golang.org/x/term v0.8.0 h1:n5xxQn2i3PC0yLAbjTpNT85q/Kgzcr2gIoX9OrJUols=
+golang.org/x/term v0.8.0/go.mod h1:xPskH00ivmX89bAKVGSKKtLOWNx2+17Eiy94tnKShWo=
 golang.org/x/text v0.3.8 h1:nAL+RVCQ9uMn3vJZbV+MRnydTJFPf8qqY42YiA6MrqY=
 golang.org/x/text v0.3.8/go.mod h1:E6s5w1FMmriuDzIBO73fBruAKo1PCIq6d2Q6DHfQ8WQ=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
@@ -77,3 +85,5 @@ gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 mvdan.cc/sh/v3 v3.6.0 h1:gtva4EXJ0dFNvl5bHjcUEvws+KRcDslT8VKheTYkbGU=
 mvdan.cc/sh/v3 v3.6.0/go.mod h1:U4mhtBLZ32iWhif5/lD+ygy1zrgaQhUu+XFy7C8+TTA=
+mvdan.cc/sh/v3 v3.7.0 h1:lSTjdP/1xsddtaKfGg7Myu7DnlHItd3/M2tomOcNNBg=
+mvdan.cc/sh/v3 v3.7.0/go.mod h1:K2gwkaesF/D7av7Kxl0HbF5kGOd2ArupNTX3X44+8l8=
diff --git a/run/interpreter.go b/run/interpreter.go
index 82c9312..b28fff7 100644
--- a/run/interpreter.go
+++ b/run/interpreter.go
@@ -10,6 +10,7 @@ import (
 	"regexp"
 	"strings"
 
+	"golang.org/x/term"
 	"mvdan.cc/sh/v3/expand"
 	"mvdan.cc/sh/v3/interp"
 	"mvdan.cc/sh/v3/syntax"
@@ -99,6 +100,9 @@ func (i interpreter) executeShell(
 	if err != nil {
 		return fmt.Errorf("failed to parse task: %w", err)
 	}
+	if os.Getenv("NO_COLOR") != "1" && term.IsTerminal(int(os.Stdout.Fd())) {
+		env = append(env, "CLICOLOR_FORCE=1", "FORCE_COLOR=1")
+	}
 	runner, err := interp.New(
 		interp.Env(expand.ListEnviron(env...)),
 		interp.StdIO(stdFiles(logPrefix)),
diff --git a/run/run.go b/run/run.go
index 4daf644..f8d4e4e 100644
--- a/run/run.go
+++ b/run/run.go
@@ -25,6 +25,7 @@ type Runner struct {
 	tasks        models.Tasks
 	dir          string
 	alreadyRan   map[string]bool
+	alreadRanMu  sync.Mutex
 }
 
 // NewRunner takes Tasks and returns a Runner.
@@ -111,11 +112,14 @@ func (r *Runner) runWithPadding(ctx context.Context, name string, inputs []strin
 	if !ok {
 		return fmt.Errorf("task %s not found", name)
 	}
+	r.alreadRanMu.Lock()
 	if task.RequiredBehaviour == models.RequiredBehaviourOnce && r.alreadyRan[task.Name] {
+		r.alreadRanMu.Unlock()
 		fmt.Printf("task %q ran already: skipping\n", task.Name)
 		return nil
 	}
 	r.alreadyRan[task.Name] = true
+	r.alreadRanMu.Unlock()
 	env := os.Environ()
 	env = append(env, task.Env...)
 	inp, err := getInputs(task, inputs, env)
diff --git a/run/run_test.go b/run/run_test.go
index 5fe6244..6541df7 100644
--- a/run/run_test.go
+++ b/run/run_test.go
@@ -4,33 +4,39 @@ import (
 	"context"
 	"errors"
 	"os"
+	"sync"
 	"testing"
 
 	"github.com/joerdav/xc/models"
 )
 
 type mockScriptRunner struct {
-	calls   int
-	returns error
+	calls       int
+	returns     error
+	runnerMutex sync.Mutex
 }
 
 func (r *mockScriptRunner) Execute(
 	ctx context.Context, text string, env, args []string, dir, logPrefix string,
 ) error {
+	r.runnerMutex.Lock()
+	defer r.runnerMutex.Unlock()
 	r.calls++
 	return r.returns
 }
 
-func TestRun(t *testing.T) {
-	tests := []struct {
-		name               string
-		tasks              models.Tasks
-		taskName           string
-		err                error
-		expectedRunError   bool
-		expectedParseError bool
-		expectedTasksRun   int
-	}{
+type testCase struct {
+	name               string
+	tasks              models.Tasks
+	taskName           string
+	err                error
+	expectedRunError   bool
+	expectedParseError bool
+	expectedTasksRun   int
+}
+
+func testCases() []testCase {
+	return []testCase{
 		{
 			name: "given an invalid task should not run command",
 			tasks: []models.Task{
@@ -165,7 +171,36 @@ func TestRun(t *testing.T) {
 			expectedTasksRun: 3,
 		},
 	}
-	for _, tt := range tests {
+}
+
+func TestRunAsync(t *testing.T) {
+	for _, tt := range testCases() {
+		tt := tt
+		t.Run(tt.name, func(t *testing.T) {
+			for i := range tt.tasks {
+				tt.tasks[i].DepsBehaviour = models.DependencyBehaviourAsync
+			}
+			runner, err := NewRunner(tt.tasks, "")
+			if (err != nil) != tt.expectedParseError {
+				t.Fatalf("expected error %v, got %v", tt.expectedParseError, err)
+			}
+			if err != nil {
+				return
+			}
+			scriptRunner := &mockScriptRunner{returns: tt.err}
+			runner.scriptRunner = scriptRunner
+			err = runner.Run(context.Background(), tt.taskName, nil)
+			if (err != nil) != tt.expectedRunError {
+				t.Fatalf("expected error %v, got %v", tt.expectedRunError, err)
+			}
+			if scriptRunner.calls != tt.expectedTasksRun {
+				t.Fatalf("expected %d task runs got %d", tt.expectedTasksRun, scriptRunner.calls)
+			}
+		})
+	}
+}
+func TestRun(t *testing.T) {
+	for _, tt := range testCases() {
 		tt := tt
 		t.Run(tt.name, func(t *testing.T) {
 			runner, err := NewRunner(tt.tasks, "")