diff --git a/src/core/websocket/ws.ts b/src/core/websocket/ws.ts
index dcc3760c..9a16477e 100644
--- a/src/core/websocket/ws.ts
+++ b/src/core/websocket/ws.ts
@@ -77,9 +77,9 @@ function addApiKeyFromHeader({
     headers: Record<string, any> | undefined;
     queryParameters: Record<string, any> | undefined;
 }) {
-    const apiKeyValue = headers?.["X-Hume-Api-Key"];
+    const apiKeyValue = Object.entries(headers ?? {}).find(([k]) => k.toLowerCase() === "x-hume-api-key")?.[1];
     if (apiKeyValue && !queryParameters?.["api_key"]) {
-        return { ...queryParameters, apiKey: apiKeyValue };
+        return { ...queryParameters, api_key: apiKeyValue };
     }
     return queryParameters;
 }