diff --git a/README.md b/README.md
index 3b725fe..33a4c4d 100644
--- a/README.md
+++ b/README.md
@@ -149,7 +149,13 @@ Commands can use `server` or `servers` interchangeably.
   - `--build-time` - Available at build time
   - `--is-literal` - Treat value as literal (don't interpolate variables)
   - `--is-multiline` - Value is multiline
-- `coolify app env update <app_uuid> <env_uuid>` - Update an environment variable
+- `coolify app env update <app_uuid>`- Update an environment variable
+  - `--key <key>` - Variable key (required)
+  - `--value <value>` - Variable value (required)
+  - `--preview` - Available in preview deployments
+  - `--build-time` - Available at build time
+  - `--is-literal` - Treat value as literal (don't interpolate variables)
+  - `--is-multiline` - Value is multiline
 - `coolify app env delete <app_uuid> <env_uuid>` - Delete an environment variable
 - `coolify app env sync <app_uuid>` - Sync environment variables from a .env file
   - `--file <path>` - Path to .env file (required)
diff --git a/cmd/service/env/update.go b/cmd/service/env/update.go
index a78b8ee..cc864bd 100644
--- a/cmd/service/env/update.go
+++ b/cmd/service/env/update.go
@@ -12,23 +12,20 @@ import (
 
 func NewUpdateCommand() *cobra.Command {
 	cmd := &cobra.Command{
-		Use:   "update <service_uuid> <env_uuid>",
+		Use:   "update <service_uuid>",
 		Short: "Update an environment variable",
-		Long:  `Update an existing environment variable. First UUID is the service, second is the specific environment variable to update.`,
-		Args:  cli.ExactArgs(2, "<uuid1> <uuid2>"),
+		Long:  `Update an existing environment variable. UUID is the service.`,
+		Args:  cli.ExactArgs(1, "<service_uuid>"),
 		RunE: func(cmd *cobra.Command, args []string) error {
 			ctx := cmd.Context()
 			serviceUUID := args[0]
-			envUUID := args[1]
 
 			client, err := cli.GetAPIClient(cmd)
 			if err != nil {
 				return fmt.Errorf("failed to get API client: %w", err)
 			}
 
-			req := &models.ServiceEnvironmentVariableUpdateRequest{
-				UUID: envUUID,
-			}
+			req := &models.ServiceEnvironmentVariableUpdateRequest{}
 
 			// Only set fields that were provided
 			if cmd.Flags().Changed("key") {
diff --git a/internal/models/service.go b/internal/models/service.go
index 4d3581c..89aaddc 100644
--- a/internal/models/service.go
+++ b/internal/models/service.go
@@ -100,7 +100,6 @@ type ServiceEnvironmentVariableCreateRequest struct {
 
 // ServiceEnvironmentVariableUpdateRequest represents the request to update a service environment variable
 type ServiceEnvironmentVariableUpdateRequest struct {
-	UUID        string  `json:"uuid"`
 	Key         *string `json:"key,omitempty"`
 	Value       *string `json:"value,omitempty"`
 	IsBuildTime *bool   `json:"is_build_time,omitempty"`
diff --git a/internal/service/service_test.go b/internal/service/service_test.go
index 4a1834e..5072ad5 100644
--- a/internal/service/service_test.go
+++ b/internal/service/service_test.go
@@ -330,8 +330,7 @@ func TestService_UpdateEnv(t *testing.T) {
 
 	newKey := "UPDATED_VAR"
 	env, err := svc.UpdateEnv(context.Background(), "service-uuid-123", &models.ServiceEnvironmentVariableUpdateRequest{
-		UUID: "env-123",
-		Key:  &newKey,
+		Key: &newKey,
 	})
 
 	require.NoError(t, err)