diff --git a/porter_sandbox/_models.py b/porter_sandbox/_models.py
index 8e291d4..0a38263 100644
--- a/porter_sandbox/_models.py
+++ b/porter_sandbox/_models.py
@@ -110,8 +110,10 @@ class SandboxSpec(BaseModel):
     command: list[str] | None = Field(default=None, description="Override image entrypoint")
     args: list[str] | None = Field(default=None, description="Arguments passed to the command")
     env: dict[str, str] | None = Field(default=None, description="Environment variables to set in the sandbox, keyed by name")
+    env_groups: list[str] | None = Field(default=None, description="Names of environment groups on the cluster whose variables are\ninjected into the sandbox, resolved to their latest version at create\ntime. On a key conflict a later group wins over an earlier one, and\nan explicit env entry wins over any group value.\n")
     volume_mounts: dict[str, str] | None = Field(default=None, description="Volumes to mount, keyed by the absolute mount path inside the\nsandbox; values are volume IDs.\n")
     networking: list[SandboxNetworkingSpec] | None = Field(default=None, description="Network exposure for the sandbox. Omit to expose nothing. Currently\nonly one entry is supported.\n")
+    ttl_seconds: int | None = Field(default=None, description="Maximum lifetime in seconds, counted from creation. The sandbox is\nterminated once it elapses. Omit for no limit.\n")
 
 
 class StatusResponse(BaseModel):
diff --git a/porter_sandbox/sandboxes.py b/porter_sandbox/sandboxes.py
index 886b0e9..8b1e561 100644
--- a/porter_sandbox/sandboxes.py
+++ b/porter_sandbox/sandboxes.py
@@ -32,8 +32,10 @@ def create(
         command: list[str] | None = None,
         args: list[str] | None = None,
         env: dict[str, str] | None = None,
+        env_groups: list[str] | None = None,
         volume_mounts: dict[str, str] | None = None,
         networking: list[SandboxNetworkingSpec] | None = None,
+        ttl_seconds: int | None = None,
     ) -> Sandbox:
         spec = SandboxSpec(
             image=image,
@@ -42,8 +44,10 @@ def create(
             command=command,
             args=args,
             env=env,
+            env_groups=env_groups,
             volume_mounts=volume_mounts,
             networking=networking,
+            ttl_seconds=ttl_seconds,
         )
         created = self._resource.create_sandbox(body=spec)
         return Sandbox(id=created.id, resource=self._resource)
@@ -90,8 +94,10 @@ async def create(
         command: list[str] | None = None,
         args: list[str] | None = None,
         env: dict[str, str] | None = None,
+        env_groups: list[str] | None = None,
         volume_mounts: dict[str, str] | None = None,
         networking: list[SandboxNetworkingSpec] | None = None,
+        ttl_seconds: int | None = None,
     ) -> AsyncSandbox:
         spec = SandboxSpec(
             image=image,
@@ -100,8 +106,10 @@ async def create(
             command=command,
             args=args,
             env=env,
+            env_groups=env_groups,
             volume_mounts=volume_mounts,
             networking=networking,
+            ttl_seconds=ttl_seconds,
         )
         created = await self._resource.create_sandbox(body=spec)
         return AsyncSandbox(id=created.id, resource=self._resource)
diff --git a/pyproject.toml b/pyproject.toml
index 43e9ccc..b8b027a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "porter-sandbox"
-version = "0.1.32"
+version = "0.1.35"
 description = "Python SDK for the Porter Sandbox API"
 readme = "README.md"
 requires-python = ">=3.10"
diff --git a/uv.lock b/uv.lock
index 9010fd2..02ad474 100644
--- a/uv.lock
+++ b/uv.lock
@@ -345,7 +345,7 @@ wheels = [
 
 [[package]]
 name = "porter-sandbox"
-version = "0.1.32"
+version = "0.1.35"
 source = { editable = "." }
 dependencies = [
     { name = "httpx" },