diff --git a/cmd/dagger/cmd/input/bool.go b/cmd/dagger/cmd/input/bool.go
new file mode 100644
index 00000000..0dd1a691
--- /dev/null
+++ b/cmd/dagger/cmd/input/bool.go
@@ -0,0 +1,38 @@
+package input
+
+import (
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+	"go.dagger.io/dagger/cmd/dagger/logger"
+	"go.dagger.io/dagger/state"
+)
+
+var boolCmd = &cobra.Command{
+	Use:   "bool <TARGET> <true|false>",
+	Short: "Add a boolean input",
+	Args:  cobra.ExactArgs(2),
+	PreRun: func(cmd *cobra.Command, args []string) {
+		// Fix Viper bug for duplicate flags:
+		// https://github.com/spf13/viper/issues/233
+		if err := viper.BindPFlags(cmd.Flags()); err != nil {
+			panic(err)
+		}
+	},
+	Run: func(cmd *cobra.Command, args []string) {
+		lg := logger.New()
+		ctx := lg.WithContext(cmd.Context())
+
+		updateEnvironmentInput(
+			ctx,
+			cmd,
+			args[0],
+			state.BoolInput(readInput(ctx, args[1])),
+		)
+	},
+}
+
+func init() {
+	if err := viper.BindPFlags(boolCmd.Flags()); err != nil {
+		panic(err)
+	}
+}
diff --git a/cmd/dagger/cmd/input/root.go b/cmd/dagger/cmd/input/root.go
index c2e52bd4..e53448f8 100644
--- a/cmd/dagger/cmd/input/root.go
+++ b/cmd/dagger/cmd/input/root.go
@@ -31,6 +31,7 @@ func init() {
 		jsonCmd,
 		yamlCmd,
 		listCmd,
+		boolCmd,
 		unsetCmd,
 	)
 }
diff --git a/state/input.go b/state/input.go
index 6072f6fd..6f4500f9 100644
--- a/state/input.go
+++ b/state/input.go
@@ -35,6 +35,7 @@ type Input struct {
 	JSON   *jsonInput   `yaml:"json,omitempty"`
 	YAML   *yamlInput   `yaml:"yaml,omitempty"`
 	File   *fileInput   `yaml:"file,omitempty"`
+	Bool   *boolInput   `yaml:"bool,omitempty"`
 }
 
 func (i Input) Compile(key string, state *State) (*compiler.Value, error) {
@@ -55,6 +56,8 @@ func (i Input) Compile(key string, state *State) (*compiler.Value, error) {
 		return i.YAML.Compile(key, state)
 	case i.File != nil:
 		return i.File.Compile(key, state)
+	case i.Bool != nil:
+		return i.Bool.Compile(key, state)
 	default:
 		return nil, fmt.Errorf("input has not been set")
 	}
@@ -201,6 +204,27 @@ func (i secretInput) PlainText() string {
 	return string(i)
 }
 
+// An input value encoded as Bool
+func BoolInput(data string) Input {
+	i := boolInput(data)
+	return Input{
+		Bool: &i,
+	}
+}
+
+type boolInput string
+
+func (i boolInput) Compile(_ string, _ *State) (*compiler.Value, error) {
+	s := map[boolInput]struct{}{
+		"true":  {},
+		"false": {},
+	}
+	if _, ok := s[i]; ok {
+		return compiler.DecodeJSON("", []byte(i))
+	}
+	return nil, fmt.Errorf("%q is not a valid boolean: <true|false>", i)
+}
+
 // An input value encoded as JSON
 func JSONInput(data string) Input {
 	i := jsonInput(data)
diff --git a/tests/cli.bats b/tests/cli.bats
index dddbb986..1dc18b8e 100644
--- a/tests/cli.bats
+++ b/tests/cli.bats
@@ -369,6 +369,35 @@ setup() {
     "$DAGGER" -e "input-subdir-git" up
 }
 
+@test "dagger input bool" {
+    "$DAGGER" init
+
+    ## Test simple input git
+    dagger_new_with_plan "input-simple-bool" "$TESTDIR"/cli/input/bool
+
+    # input git
+    "$DAGGER" -e "input-simple-bool" input list --show-optional
+    run "$DAGGER" -e "input-simple-bool" query first
+    assert_output 'false'
+    run "$DAGGER" -e "input-simple-bool" query second
+    assert_output '{}'
+
+    "$DAGGER" -e "input-simple-bool" input bool first true
+    run "$DAGGER" -e "input-simple-bool" query first
+    assert_output 'true'
+    run "$DAGGER" -e "input-simple-bool" query second
+    assert_output 'true'
+
+    "$DAGGER" -e "input-simple-bool" input bool first false
+    run "$DAGGER" -e "input-simple-bool" query first
+    assert_output 'false'
+    run "$DAGGER" -e "input-simple-bool" query second
+    assert_output '{}'
+
+    run "$DAGGER" -e "input-simple-bool" input bool first Anything
+    assert_failure
+}
+
 @test "dagger input list" {
     "$DAGGER" init
 
diff --git a/tests/cli/input/bool/main.cue b/tests/cli/input/bool/main.cue
new file mode 100644
index 00000000..f89e9a1c
--- /dev/null
+++ b/tests/cli/input/bool/main.cue
@@ -0,0 +1,11 @@
+package testing
+
+import (
+	"alpha.dagger.io/dagger"
+)
+
+first: dagger.#Input & {bool | *false}
+
+if first == true {
+	second: true
+}