diff --git a/koyeb/sandbox/sandbox.py b/koyeb/sandbox/sandbox.py
index cc2dfeb5..4102c36a 100644
--- a/koyeb/sandbox/sandbox.py
+++ b/koyeb/sandbox/sandbox.py
@@ -21,7 +21,6 @@
 from .utils import (
     DEFAULT_INSTANCE_WAIT_TIMEOUT,
     DEFAULT_POLL_INTERVAL,
-    IdleTimeout,
     SandboxError,
     SandboxTimeoutError,
     async_wrapper,
@@ -110,7 +109,7 @@ def create(
         region: Optional[str] = None,
         api_token: Optional[str] = None,
         timeout: int = 300,
-        idle_timeout: Optional[IdleTimeout] = 300,
+        idle_timeout: int = 300,
         enable_tcp_proxy: bool = False,
         privileged: bool = False,
         _experimental_enable_light_sleep: bool = False,
@@ -191,7 +190,7 @@ def _create_sync(
         region: Optional[str] = None,
         api_token: Optional[str] = None,
         timeout: int = 300,
-        idle_timeout: Optional[IdleTimeout] = 300,
+        idle_timeout: int = 300,
         enable_tcp_proxy: bool = False,
         privileged: bool = False,
         _experimental_enable_light_sleep: bool = False,
@@ -849,7 +848,7 @@ async def create(
         region: Optional[str] = None,
         api_token: Optional[str] = None,
         timeout: int = 300,
-        idle_timeout: Optional[IdleTimeout] = 300,
+        idle_timeout: int = 300,
         enable_tcp_proxy: bool = False,
         privileged: bool = False,
         _experimental_enable_light_sleep: bool = False,
diff --git a/koyeb/sandbox/utils.py b/koyeb/sandbox/utils.py
index 9c216322..3523bf9a 100644
--- a/koyeb/sandbox/utils.py
+++ b/koyeb/sandbox/utils.py
@@ -8,7 +8,7 @@
 import logging
 import os
 import shlex
-from typing import Any, Callable, Dict, List, Literal, Optional, TypedDict, Union
+from typing import Any, Callable, Dict, List, Optional
 
 from koyeb.api import ApiClient, Configuration
 from koyeb.api.api import AppsApi, CatalogInstancesApi, InstancesApi, ServicesApi
@@ -47,23 +47,6 @@
     "DIR_NOT_EMPTY": ["not empty", "Directory not empty"],
 }
 
-# Type definitions for idle timeout
-IdleTimeoutSeconds = int
-
-
-class IdleTimeoutConfig(TypedDict, total=False):
-    """Configuration for idle timeout with light and deep sleep."""
-
-    light_sleep: IdleTimeoutSeconds  # Optional, but if provided, deep_sleep is required
-    deep_sleep: IdleTimeoutSeconds  # Required
-
-
-IdleTimeout = Union[
-    Literal[0],  # Disable scale-to-zero
-    IdleTimeoutSeconds,  # Deep sleep only (standard and GPU instances)
-    IdleTimeoutConfig,  # Explicit light_sleep/deep_sleep configuration
-]
-
 # Valid protocols for DeploymentPort (from OpenAPI spec: http, http2, tcp)
 # For sandboxes, we only support http and http2
 VALID_DEPLOYMENT_PORT_PROTOCOLS = ("http", "http2")
@@ -244,7 +227,7 @@ def create_deployment_definition(
     exposed_port_protocol: Optional[str] = None,
     region: Optional[str] = None,
     routes: Optional[List[DeploymentRoute]] = None,
-    idle_timeout: Optional[IdleTimeout] = 300,
+    idle_timeout: int = 300,
     enable_tcp_proxy: bool = False,
     _experimental_enable_light_sleep: bool = False,
 ) -> DeploymentDefinition:
@@ -290,7 +273,7 @@ def create_deployment_definition(
     deployment_type = DeploymentDefinitionType.SANDBOX
 
     # Process idle_timeout
-    if idle_timeout is None or idle_timeout == 0:
+    if idle_timeout == 0:
         sleep_idle_delay = None
     elif _experimental_enable_light_sleep:
         # Experimental mode: idle_timeout sets light_sleep value, deep_sleep is always 3900
@@ -306,7 +289,7 @@ def create_deployment_definition(
 
     # Create scaling configuration
     # If idle_timeout is 0, explicitly disable scale-to-zero (min=1, always-on)
-    # Otherwise (None or int > 0), enable scale-to-zero (min=0)
+    # Otherwise (int > 0), enable scale-to-zero (min=0)
     min_scale = 1 if idle_timeout == 0 else 0
     targets = None
     if sleep_idle_delay is not None: