diff --git a/pyproject.toml b/pyproject.toml
index 722a7c9..b0f8435 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "scrapybara"
-version = "2.0.1"
+version = "2.0.2"
 description = ""
 readme = "README.md"
 authors = []
diff --git a/src/scrapybara/client.py b/src/scrapybara/client.py
index 683508a..b289242 100644
--- a/src/scrapybara/client.py
+++ b/src/scrapybara/client.py
@@ -1,6 +1,8 @@
 from datetime import datetime
 from typing import Optional, Any, Dict, List, Sequence, Union, Literal
 import typing
+import httpx
+import os
 
 from scrapybara.environment import ScrapybaraEnvironment
 from .core.request_options import RequestOptions
@@ -22,12 +24,10 @@
     StopBrowserResponse,
     StopInstanceResponse,
 )
-
-OMIT = typing.cast(typing.Any, ...)
-
 from .base_client import BaseClient, AsyncBaseClient
 from .instance.types import Action, Command
-import httpx
+
+OMIT = typing.cast(typing.Any, ...)
 
 
 class Browser:
@@ -680,7 +680,7 @@ def __init__(
         *,
         base_url: Optional[str] = None,
         environment: ScrapybaraEnvironment = ScrapybaraEnvironment.PRODUCTION,
-        api_key: Optional[str] = None,
+        api_key: Optional[str] = os.getenv("SCRAPYBARA_API_KEY"),
         timeout: Optional[float] = None,
         follow_redirects: Optional[bool] = True,
         httpx_client: Optional[httpx.Client] = None,
@@ -735,7 +735,7 @@ def __init__(
         *,
         base_url: Optional[str] = None,
         environment: ScrapybaraEnvironment = ScrapybaraEnvironment.PRODUCTION,
-        api_key: Optional[str] = None,
+        api_key: Optional[str] = os.getenv("SCRAPYBARA_API_KEY"),
         timeout: Optional[float] = None,
         follow_redirects: Optional[bool] = True,
         httpx_client: Optional[httpx.AsyncClient] = None,
diff --git a/tests/custom/test_client.py b/tests/custom/test_client.py
index 7dcd4b9..a9a60a0 100644
--- a/tests/custom/test_client.py
+++ b/tests/custom/test_client.py
@@ -5,7 +5,7 @@
 def test_client() -> None:
     if os.getenv("SCRAPYBARA_API_KEY") is None:
         raise ValueError("SCRAPYBARA_API_KEY is not set")
-    client = Scrapybara(api_key=os.getenv("SCRAPYBARA_API_KEY"))
+    client = Scrapybara()
     instance = client.start()
     assert instance.id is not None
     screenshot_response = instance.screenshot()