diff --git a/messagix/mercury.go b/messagix/mercury.go
index fa3f74d..61c2f37 100644
--- a/messagix/mercury.go
+++ b/messagix/mercury.go
@@ -53,7 +53,7 @@ func (c *Client) SendMercuryUploadRequest(ctx context.Context, threadID int64, m
 
 	_, respBody, err := c.MakeRequest(url, "POST", h, payload, types.NONE)
 	if err != nil {
-		return nil, fmt.Errorf("failed to send MercuryUploadRequest: %v", err)
+		return nil, fmt.Errorf("failed to send MercuryUploadRequest: %w", err)
 	}
 
 	resp, err := c.parseMercuryResponse(ctx, respBody)