diff --git a/packages/core/src/llm/LLM.ts b/packages/core/src/llm/LLM.ts
index 94591f74607c161a30652a13656e756b3e28d90e..91389b70a64476c2d73b55c083a727668129b2f4 100644
--- a/packages/core/src/llm/LLM.ts
+++ b/packages/core/src/llm/LLM.ts
@@ -598,7 +598,7 @@ export class Anthropic implements LLM {
 
 export class Portkey implements LLM {
   apiKey?: string = undefined;
-  baseUrl?: string = undefined;
+  baseURL?: string = undefined;
   mode?: string = undefined;
   llms?: [LLMOptions] | null = undefined;
   session: PortkeySession;
@@ -606,12 +606,12 @@ export class Portkey implements LLM {
 
   constructor(init?: Partial<Portkey>) {
     this.apiKey = init?.apiKey
-    this.baseUrl = init?.baseUrl
+    this.baseURL = init?.baseURL
     this.mode = init?.mode
     this.llms = init?.llms
     this.session = getPortkeySession({
       apiKey: this.apiKey,
-      baseUrl: this.baseUrl,
+      baseURL: this.baseURL,
       llms: this.llms,
       mode: this.mode
     })
diff --git a/packages/core/src/llm/portkey.ts b/packages/core/src/llm/portkey.ts
index a776b32eac76ca9e6ca3354dc18ca673e89cca47..b4a5a326a2eda760572a22324b55818f8b8a5b55 100644
--- a/packages/core/src/llm/portkey.ts
+++ b/packages/core/src/llm/portkey.ts
@@ -10,7 +10,7 @@ export const readEnv = (env: string, default_val?: string): string | undefined =
 
 interface PortkeyOptions {
   apiKey?: string;
-  baseUrl?: string;
+  baseURL?: string;
   mode?: string;
   llms?: [LLMOptions] | null
 }
@@ -23,8 +23,8 @@ export class PortkeySession {
       options.apiKey = readEnv('PORTKEY_API_KEY')
     }
 
-    if (!options.baseUrl) {
-      options.baseUrl = readEnv('PORTKEY_BASE_URL', "https://api.portkey.ai")
+    if (!options.baseURL) {
+      options.baseURL = readEnv('PORTKEY_BASE_URL', "https://api.portkey.ai")
     }
 
     this.portkey = new Portkey({});