diff --git a/CHANGELOG.md b/CHANGELOG.md
index fedc8f0..74dfbf0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,10 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
+## [Unreleased]
+
+- api key fallback
+  
 ## [0.2.9] - 2023-11-04 
 
 - Add Request Body Parsing
diff --git a/src/baselime.ts b/src/baselime.ts
index 853a1c6..c39f3f4 100644
--- a/src/baselime.ts
+++ b/src/baselime.ts
@@ -34,7 +34,7 @@ export class BaselimeSDK {
     constructor(options: BaselimeSDKOpts) {
         options.serverless = options.serverless || false;
         options.collectorUrl = options.collectorUrl || process.env.COLLECTOR_URL || "https://otel.baselime.io/v1";
-        options.baselimeKey = options.baselimeKey || process.env.BASELIME_KEY
+        options.baselimeKey = options.baselimeKey || process.env.BASELIME_API_KEY || process.env.BASELIME_KEY
  
 
         this.options = options;