diff --git a/CHANGELOG.md b/CHANGELOG.md
index f2df1c9..0284e22 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,12 @@
 
 All notable changes to this project will be documented in this file.
 
+## [0.5.5] - 2025-10-05
+
+### Changed
+
+- Change login from json_data to form_data for v6 login
+
 ## [0.5.4] - 2025-10-01
 
 ### Added
diff --git a/airos/base.py b/airos/base.py
index c1ae6c4..506917a 100644
--- a/airos/base.py
+++ b/airos/base.py
@@ -268,16 +268,23 @@ async def login(self) -> None:
                 "POST", self._login_urls["default"], json_data=payload
             )
         except AirOSUrlNotFoundError:
-            try:
-                await self._request_json(
-                    "POST", self._login_urls["v6_alternative"], json_data=payload
-                )
-            except AirOSConnectionSetupError as err:
-                raise AirOSConnectionSetupError(
-                    "Failed to login to default and alternate AirOS device urls"
-                ) from err
+            pass  # Try next URL
         except AirOSConnectionSetupError as err:
             raise AirOSConnectionSetupError("Failed to login to AirOS device") from err
+        else:
+            return
+
+        try:  # Alternative URL
+            await self._request_json(
+                "POST",
+                self._login_urls["v6_alternative"],
+                form_data=payload,
+                ct_form=True,
+            )
+        except AirOSConnectionSetupError as err:
+            raise AirOSConnectionSetupError(
+                "Failed to login to default and alternate AirOS device urls"
+            ) from err
 
     async def status(self) -> AirOSDataModel:
         """Retrieve status from the device."""
diff --git a/pyproject.toml b/pyproject.toml
index 281e7fa..b77a7d9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name            = "airos"
-version         = "0.5.4"
+version         = "0.5.5"
 license         = "MIT"
 description     = "Ubiquiti airOS module(s) for Python 3."
 readme          = "README.md"