diff --git a/CHANGELOG.md b/CHANGELOG.md
index bc25033..0716942 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+### v3.19.1 (2026-03-11)
+* * *
+### Bug Fixes:
+- Fixed URL construction to avoid appending a trailing `?` when there are no query parameters.
+
 ### v3.19.0 (2026-03-02)
 * * *
 ### New Resources:
diff --git a/VERSION b/VERSION
index 419f300..4f6817b 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-3.19.0
+3.19.1
diff --git a/chargebee/http_request.py b/chargebee/http_request.py
index a85d898..37fdd1a 100644
--- a/chargebee/http_request.py
+++ b/chargebee/http_request.py
@@ -81,8 +81,8 @@ def request(
 
     meta = compat.urlparse(url)
     scheme = "https" if Chargebee.verify_ca_certs or env.protocol == "https" else "http"
-    full_url = f"{scheme}://{meta.netloc + meta.path + '?' + meta.query}"
-
+    base = f"{scheme}://{meta.netloc}{meta.path}"
+    full_url = f"{base}?{meta.query}" if meta.query else base
     timeout = httpx.Timeout(
         None,
         connect=env.connect_timeout,
diff --git a/chargebee/version.py b/chargebee/version.py
index 9f92b45..70e1ba4 100644
--- a/chargebee/version.py
+++ b/chargebee/version.py
@@ -1 +1 @@
-VERSION = "3.19.0"
+VERSION = "3.19.1"
diff --git a/tests/test_http_request.py b/tests/test_http_request.py
index ea3ec3b..d0b131d 100644
--- a/tests/test_http_request.py
+++ b/tests/test_http_request.py
@@ -275,7 +275,7 @@ def test_subdomain_url(self, mock_client_class):
 
         call_args = mock_client.request.call_args
         self.assertEqual(
-            call_args[1]["url"], "https://test_site.ingest.chargebee.com/api/v2/test?"
+            call_args[1]["url"], "https://test_site.ingest.chargebee.com/api/v2/test"
         )
 
     @patch("httpx.Client")
@@ -331,6 +331,49 @@ class Priority(Enum):
         self.assertEqual(json_data["items"][1]["status"], "inactive")
         self.assertEqual(json_data["items"][1]["priority"], 3)
 
+    @patch("httpx.Client")
+    def test_url_no_trailing_question_mark_without_query_params(
+        self, mock_client_class
+    ):
+        """Test that URLs without query params don't get a trailing '?'"""
+        mock_client, mock_response = make_mock_client(
+            text=json.dumps({"message": "success"})
+        )
+        mock_client.request.return_value = mock_response
+        mock_client_class.return_value.__enter__.return_value = mock_client
+
+        from chargebee.http_request import request
+
+        request("POST", "/test", MockEnvironment(), params={"key": "value"})
+
+        call_args = mock_client.request.call_args
+        url = call_args[1]["url"]
+        self.assertFalse(url.endswith("?"), f"URL should not end with '?', got: {url}")
+
+    @patch("httpx.Client")
+    def test_url_preserves_query_string_when_present(self, mock_client_class):
+        """Test that URLs with an existing query string are preserved correctly"""
+        mock_client, mock_response = make_mock_client(
+            text=json.dumps({"message": "success"})
+        )
+        mock_client.request.return_value = mock_response
+        mock_client_class.return_value.__enter__.return_value = mock_client
+
+        from chargebee.http_request import request
+
+        class MockEnvironmentWithQuery(MockEnvironment):
+            def api_url(self, url, subDomain=None):
+                return super().api_url(url, subDomain) + "?existing=param"
+
+        request("GET", "/test", MockEnvironmentWithQuery(), params={})
+
+        call_args = mock_client.request.call_args
+        url = call_args[1]["url"]
+        self.assertIn("?existing=param", url)
+        self.assertFalse(
+            url.endswith("?"), f"URL should not end with bare '?', got: {url}"
+        )
+
     @patch("httpx.Client")
     def test_form_request_without_enum_conversion(self, mock_client_class):
         """Test that form requests (non-JSON) don't use convert_to_serializable"""