diff --git a/README.md b/README.md
index 7167546..9420294 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,7 @@ from web_search import WebSearch, WebSearchConfig, GoogleSearchConfig
 config = WebSearchConfig(
     sources=["google", "wikipedia"],
     google_config=GoogleSearchConfig(
-        api_key="your_api_key",
+        api_key="your_google_api_key",
         cse_id="your_cse_id"
     )
 )
diff --git a/src/web_search/config.py b/src/web_search/config.py
index d48f2dd..5bcd707 100644
--- a/src/web_search/config.py
+++ b/src/web_search/config.py
@@ -1,4 +1,5 @@
 from dataclasses import dataclass, field
+import os
 from typing import Literal
 
 SearchSources = Literal["google", "wikipedia", "arxiv"]
@@ -6,8 +7,8 @@
 
 @dataclass
 class GoogleSearchConfig:
-    api_key: str
-    cse_id: str
+    api_key: str = os.environ["GOOGLE_API_KEY"]
+    cse_id: str = os.environ["CSE_ID"]
     max_results: int = 3
     app_domain: str | None = None
 
@@ -33,4 +34,4 @@ class SearchResult:
     preview: str
 
     def __str__(self):
-        return f"Title: {self.title}\nPreview: {self.preview}"
\ No newline at end of file
+        return f"Title: {self.title}\nPreview: {self.preview}"