diff --git a/client.go b/client.go
index 9ae8c57..1601adf 100644
--- a/client.go
+++ b/client.go
@@ -155,12 +155,12 @@ func (c *Client) newRequest(
 	return req, nil
 }
 
-// Response is an interface for a response.
-type Response interface {
+// response is an interface for a response.
+type response interface {
 	SetHeader(http.Header)
 }
 
-func (c *Client) sendRequest(req *http.Request, v Response) error {
+func (c *Client) sendRequest(req *http.Request, v response) error {
 	req.Header.Set("Accept", "application/json")
 
 	// Check whether Content-Type is already set, Upload Files API requires
diff --git a/stream.go b/stream.go
index b6d0b2f..bd597a2 100644
--- a/stream.go
+++ b/stream.go
@@ -39,8 +39,7 @@ func (c *Client) CreateCompletionStream(
 		ctx,
 		http.MethodPost,
 		c.fullURL(completionsSuffix, withModel(request.Model)),
-		withBody(request),
-	)
+		withBody(request))
 	if err != nil {
 		return nil, err
 	}
@@ -65,7 +64,7 @@ type streamReader[T streamer] struct {
 	response       *http.Response
 	errAccumulator ErrorAccumulator
 
-	http.Header // Header is the header of the response.
+	Header http.Header // Header is the header of the response.
 }
 
 // Recv receives a response from the stream.
@@ -133,12 +132,10 @@ func (stream *streamReader[T]) unmarshalError() (errResp *ErrorResponse) {
 	if len(errBytes) == 0 {
 		return
 	}
-
 	err := json.Unmarshal(errBytes, &errResp)
 	if err != nil {
 		errResp = nil
 	}
-
 	return
 }