diff --git a/src/OddsClient.php b/src/OddsClient.php
index 4bc3ea3..5b67594 100644
--- a/src/OddsClient.php
+++ b/src/OddsClient.php
@@ -153,7 +153,7 @@ public function setBookmakers(mixed $bookmakers): self
             $bookmakerString = http_build_query($bookmakers, '', ',');
         }
 
-        $this->params['markets'] = $bookmakerString ?? $bookmakers;
+        $this->params['bookmakers'] = $bookmakerString ?? $bookmakers;
 
         return $this;
     }