diff --git a/hubspot/utils/requests/http_request_builder.py b/hubspot/utils/requests/http_request_builder.py
index 047674bc..fc3a3f87 100644
--- a/hubspot/utils/requests/http_request_builder.py
+++ b/hubspot/utils/requests/http_request_builder.py
@@ -67,8 +67,9 @@ def generate_url(self) -> str:
 
         qs = self.options.get("qs")
         if qs:
-            query_string = urlencode(qs)
-            url += f"?{query_string}"
+            query_string = urlencode(qs, doseq=True)
+            delimiter = "&" if "?" in url else "?"
+            url += f"{delimiter}{query_string}"
 
         return url