diff --git a/src/connection/grpc.ts b/src/connection/grpc.ts
index 327d4b27..05bef690 100644
--- a/src/connection/grpc.ts
+++ b/src/connection/grpc.ts
@@ -264,8 +264,6 @@ const getMetadataWithEmbeddingServiceAuth = (config: GrpcConnectionParams, beare
           ...config.headers,
           authorization: bearerToken,
           'X-Weaviate-Cluster-Url': config.host,
-          //  keeping for backwards compatibility for older clusters for now. On newer clusters, Embedding Service reuses Authorization header.
-          'X-Weaviate-Api-Key': bearerToken,
         }
       : config.headers
   );
diff --git a/src/connection/http.ts b/src/connection/http.ts
index db80b97c..8c2ef07f 100644
--- a/src/connection/http.ts
+++ b/src/connection/http.ts
@@ -435,7 +435,5 @@ const getAuthHeaders = (config: InternalConnectionParams, bearerToken: string) =
     ? {
         Authorization: `Bearer ${bearerToken}`,
         'X-Weaviate-Cluster-Url': config.host,
-        //  keeping for backwards compatibility for older clusters for now. On newer clusters, Embedding Service reuses Authorization header.
-        'X-Weaviate-Api-Key': bearerToken,
       }
     : undefined;