diff --git a/src/_types/generalTypes.ts b/src/_types/generalTypes.ts
index d1a785a..30a5160 100644
--- a/src/_types/generalTypes.ts
+++ b/src/_types/generalTypes.ts
@@ -12,6 +12,7 @@ export interface ApiClientInterface {
     cacheForceRefresh?: boolean | null | undefined;
     debug?: boolean | null | undefined;
     customHost?: string | null | undefined
+    cacheNamespace?: string | null | undefined;
 }
 
 export interface APIResponseType {
diff --git a/src/baseClient.ts b/src/baseClient.ts
index dbf6937..51f96ce 100644
--- a/src/baseClient.ts
+++ b/src/baseClient.ts
@@ -120,10 +120,10 @@ export abstract class ApiClient {
     portkeyHeaders: Record<string, string>
 
     private fetch: Fetch;
-    constructor({ apiKey, baseURL, config, virtualKey, traceID, metadata, provider, Authorization, cacheForceRefresh, debug, customHost }: ApiClientInterface) {
+    constructor({ apiKey, baseURL, config, virtualKey, traceID, metadata, provider, Authorization, cacheForceRefresh, debug, customHost, cacheNamespace }: ApiClientInterface) {
         this.apiKey = apiKey ?? "";
         this.baseURL = baseURL ?? "";
-        this.customHeaders = createHeaders({ apiKey, config, virtualKey, traceID, metadata, provider, Authorization, cacheForceRefresh, debug, customHost })
+        this.customHeaders = createHeaders({ apiKey, config, virtualKey, traceID, metadata, provider, Authorization, cacheForceRefresh, debug, customHost, cacheNamespace })
         this.portkeyHeaders = this.defaultHeaders()
         this.fetch = fetch;
         this.responseHeaders = {}
diff --git a/src/client.ts b/src/client.ts
index 23559d5..a9dd992 100644
--- a/src/client.ts
+++ b/src/client.ts
@@ -17,6 +17,7 @@ export class Portkey extends ApiClient {
 	cacheForceRefresh?: boolean | null | undefined;
 	debug?: boolean | null | undefined;
 	customHost?: string | null | undefined;
+	cacheNamespace?: string | null | undefined;
 	constructor({
 		apiKey = readEnv("PORTKEY_API_KEY") ?? null,
 		baseURL = readEnv("PORTKEY_BASE_URL") ?? null,
@@ -29,6 +30,7 @@ export class Portkey extends ApiClient {
 		cacheForceRefresh,
 		debug,
 		customHost,
+		cacheNamespace,
 	}: ApiClientInterface) {
 
 		super({
@@ -42,7 +44,8 @@ export class Portkey extends ApiClient {
 			Authorization,
 			cacheForceRefresh,
 			debug,
-			customHost
+			customHost,
+			cacheNamespace
 		});
 
 		this.apiKey = apiKey;
@@ -57,7 +60,8 @@ export class Portkey extends ApiClient {
 		this.metadata = metadata
 		this.cacheForceRefresh = cacheForceRefresh;
 		this.debug = debug;
-		this.customHost = customHost
+		this.customHost = customHost;
+		this.cacheNamespace = cacheNamespace;
 	}
 
 	completions: API.Completions = new API.Completions(this);