diff --git a/src/urls/query_params.rs b/src/urls/query_params.rs
index 37c66df3..40f912e9 100644
--- a/src/urls/query_params.rs
+++ b/src/urls/query_params.rs
@@ -31,7 +31,7 @@ fn urlencode(s: &str) -> String {
         .collect()
 }
 
-#[pyclass(str)]
+#[pyclass]
 #[derive(Debug, Clone, Eq)]
 pub struct QueryParams {
     params: IndexMap<String, Vec<String>>,