diff --git a/highway_env/__init__.py b/highway_env/__init__.py
index ffcc0b53b..a1c1d9138 100644
--- a/highway_env/__init__.py
+++ b/highway_env/__init__.py
@@ -1,10 +1,9 @@
 import os
 import sys
 
-import gymnasium as gym
+from gymnasium.envs.registration import register
 
-
-__version__ = "1.9.0"
+__version__ = "2.0.0"
 
 try:
     from farama_notifications import notifications
@@ -25,94 +24,94 @@ def _register_highway_envs():
     from highway_env.envs.common.abstract import MultiAgentWrapper
 
     # exit_env.py
-    gym.register(
+    register(
         id="exit-v0",
         entry_point="highway_env.envs.exit_env:ExitEnv",
     )
 
     # highway_env.py
-    gym.register(
+    register(
         id="highway-v0",
         entry_point="highway_env.envs.highway_env:HighwayEnv",
     )
 
-    gym.register(
+    register(
         id="highway-fast-v0",
         entry_point="highway_env.envs.highway_env:HighwayEnvFast",
     )
 
     # intersection_env.py
-    gym.register(
+    register(
         id="intersection-v0",
         entry_point="highway_env.envs.intersection_env:IntersectionEnv",
     )
 
-    gym.register(
+    register(
         id="intersection-v1",
         entry_point="highway_env.envs.intersection_env:ContinuousIntersectionEnv",
     )
 
-    gym.register(
+    register(
         id="intersection-multi-agent-v0",
         entry_point="highway_env.envs.intersection_env:MultiAgentIntersectionEnv",
     )
 
-    gym.register(
+    register(
         id="intersection-multi-agent-v1",
         entry_point="highway_env.envs.intersection_env:MultiAgentIntersectionEnv",
         additional_wrappers=(MultiAgentWrapper.wrapper_spec(),),
     )
 
     # lane_keeping_env.py
-    gym.register(
+    register(
         id="lane-keeping-v0",
         entry_point="highway_env.envs.lane_keeping_env:LaneKeepingEnv",
         max_episode_steps=200,
     )
 
     # merge_env.py
-    gym.register(
+    register(
         id="merge-v0",
         entry_point="highway_env.envs.merge_env:MergeEnv",
     )
 
     # parking_env.py
-    gym.register(
+    register(
         id="parking-v0",
         entry_point="highway_env.envs.parking_env:ParkingEnv",
     )
 
-    gym.register(
+    register(
         id="parking-ActionRepeat-v0",
         entry_point="highway_env.envs.parking_env:ParkingEnvActionRepeat",
     )
 
-    gym.register(
+    register(
         id="parking-parked-v0",
         entry_point="highway_env.envs.parking_env:ParkingEnvParkedVehicles",
     )
 
     # racetrack_env.py
-    gym.register(
+    register(
         id="racetrack-v0",
         entry_point="highway_env.envs.racetrack_env:RacetrackEnv",
     )
 
     # roundabout_env.py
-    gym.register(
+    register(
         id="roundabout-v0",
         entry_point="highway_env.envs.roundabout_env:RoundaboutEnv",
     )
 
     # two_way_env.py
-    gym.register(
+    register(
         id="two-way-v0",
         entry_point="highway_env.envs.two_way_env:TwoWayEnv",
         max_episode_steps=15,
     )
 
     # u_turn_env.py
-    gym.register(id="u-turn-v0", entry_point="highway_env.envs.u_turn_env:UTurnEnv")
+    register(id="u-turn-v0", entry_point="highway_env.envs.u_turn_env:UTurnEnv")
 
 
 _register_highway_envs()
diff --git a/setup.cfg b/setup.cfg
index fd2a62b7c..3c9a99bf5 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -25,7 +25,7 @@ setup_requires=
     pytest-runner
 install_requires=
     farama-notifications
-    gymnasium>=0.27
+    gymnasium>=0.28
     numpy
     pygame>=2.0.2
     matplotlib
diff --git a/tests/envs/test_gym.py b/tests/envs/test_gym.py
index 6246d8060..7514b6924 100644
--- a/tests/envs/test_gym.py
+++ b/tests/envs/test_gym.py
@@ -45,7 +45,7 @@ def test_highway_api(env_id):
     for warning in caught_warnings:
         if "is different from the unwrapped version" in warning.message.args[0]:
             continue
-        if warning.message.args[0] not in CHECK_ENV_IGNORE_WARNINGS:
+        elif warning.message.args[0] not in CHECK_ENV_IGNORE_WARNINGS:
             raise gym.error.Error(f"Unexpected warning: {warning.message}")