diff --git a/pypesa/mpesa.py b/pypesa/mpesa.py
index 4f78cf9..756c1f6 100644
--- a/pypesa/mpesa.py
+++ b/pypesa/mpesa.py
@@ -426,7 +426,7 @@ def query_transaction_status(self, transaction_query: Dict) -> Dict:
         try:
             return requests.get(
                 self.urls.transaction_status,
-                json=transaction_query,
+                params=transaction_query,
                 headers=self.default_headers(),
                 verify=True,
             ).json()
@@ -500,4 +500,4 @@ def direct_debit_payment(self, transaction_query: Dict) -> Dict:
         except (requests.ConnectTimeout, requests.ConnectionError):
             raise MpesaConnectionError
 
-#sys.modules[__name__] = Mpesa
\ No newline at end of file
+#sys.modules[__name__] = Mpesa