diff --git a/cmd/dagger/cmd/up.go b/cmd/dagger/cmd/up.go
index 721f8af1..b1b14a8f 100644
--- a/cmd/dagger/cmd/up.go
+++ b/cmd/dagger/cmd/up.go
@@ -24,6 +24,8 @@ import (
 	"github.com/spf13/viper"
 )
 
+var withParams []string
+
 var upCmd = &cobra.Command{
 	Use:   "up",
 	Short: "Bring an environment online with latest plan and inputs",
@@ -142,7 +144,7 @@ func checkUniverseVersion(ctx context.Context, projectPath string) bool {
 func europaUp(ctx context.Context, cl *client.Client, args ...string) error {
 	lg := log.Ctx(ctx)
 
-	p, err := plan.Load(ctx, args...)
+	p, err := plan.Load(ctx, withParams, args...)
 	if err != nil {
 		lg.Fatal().Err(err).Msg("failed to load plan")
 	}
@@ -220,6 +222,7 @@ func checkInputs(ctx context.Context, env *environment.Environment) error {
 func init() {
 	upCmd.Flags().BoolP("force", "f", false, "Force up, disable inputs check")
 	upCmd.Flags().String("output", "", "Write computed output. Prints on stdout if set to-")
+	upCmd.Flags().StringArrayVarP(&withParams, "with", "w", []string{}, "")
 
 	if err := viper.BindPFlags(upCmd.Flags()); err != nil {
 		panic(err)
diff --git a/plan/plan.go b/plan/plan.go
index 659b79d6..fe6e7581 100644
--- a/plan/plan.go
+++ b/plan/plan.go
@@ -23,7 +23,7 @@ type Plan struct {
 	source  *compiler.Value
 }
 
-func Load(ctx context.Context, args ...string) (*Plan, error) {
+func Load(ctx context.Context, withParams []string, args ...string) (*Plan, error) {
 	log.Ctx(ctx).Debug().Interface("args", args).Msg("loading plan")
 
 	// FIXME: universe vendoring
@@ -36,6 +36,21 @@ func Load(ctx context.Context, args ...string) (*Plan, error) {
 		return nil, err
 	}
 
+	if len(withParams) > 0 {
+		for i, param := range withParams {
+			log.Ctx(ctx).Debug().Interface("with", param).Msg("applying parameter")
+			paramV, err := compiler.Compile(fmt.Sprintf("with%v", i), param)
+			if err != nil {
+				return nil, err
+			}
+
+			fillErr := v.FillPath(cue.ParsePath("inputs.params"), paramV)
+			if fillErr != nil {
+				return nil, err
+			}
+		}
+	}
+
 	p := &Plan{
 		context: plancontext.New(),
 		source:  v,
diff --git a/stdlib/europa/dagger/engine/plan.cue b/stdlib/europa/dagger/engine/plan.cue
index 29b2efaf..20ebce6a 100644
--- a/stdlib/europa/dagger/engine/plan.cue
+++ b/stdlib/europa/dagger/engine/plan.cue
@@ -12,10 +12,7 @@ package engine
 		// Securely receive secrets
 		secrets: [name=string]: _#inputSecret
 		// Receive runtime parameters
-		params: {
-			@dagger(notimplemented)
-			[name=string]: _
-		}
+		params: [name=string]: _
 	}
 
 	// Send outputs to the client