diff --git a/twitter_scraper/config.py b/twitter_scraper/config.py
index 64f0b7e..4a9de54 100644
--- a/twitter_scraper/config.py
+++ b/twitter_scraper/config.py
@@ -1,4 +1,6 @@
-"""Configuration constants for TwitterDataScraper."""
+from __future__ import annotations
+
+import os
 
 TWITTER_LOGIN_URL = "https://twitter.com/i/flow/login"
 TWITTER_BASE_URL = "https://twitter.com"
@@ -24,8 +26,6 @@
 PROFILE_HREF_PATTERN = r"^/[A-Za-z0-9_]{1,15}$"
 
 # User agent (Chrome 131 - January 2025)
-USER_AGENT = (
-    "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) "
-    "AppleWebKit/537.36 (KHTML, like Gecko) "
-    "Chrome/131.0.0.0 Safari/537.36"
-)
+USER_AGENT_ENV_VAR = os.getenv('TWITTER_USER_AGENT', "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36")
+
+USER_AGENT = USER_AGENT_ENV_VAR
\ No newline at end of file