diff --git a/examples/run_gymnasium.py b/examples/run_gymnasium.py
index c31e9e38..03530ead 100644
--- a/examples/run_gymnasium.py
+++ b/examples/run_gymnasium.py
@@ -4,7 +4,7 @@
 register(
     id="simglucose/adolescent2-v0",
     entry_point="simglucose.envs:T1DSimGymnaisumEnv",
-    max_episode_steps=10,
+    max_episode_steps=1000,
     kwargs={"patient_name": "adolescent#002"},
 )
 
diff --git a/setup.py b/setup.py
index 9939c187..e44e3db4 100644
--- a/setup.py
+++ b/setup.py
@@ -2,7 +2,7 @@
 
 setup(
     name="simglucose",
-    version="0.2.9",
+    version="0.2.10",
     description="A Type-1 Diabetes Simulator as a Reinforcement Learning Environment in OpenAI gym or rllab (python implementation of UVa/Padova Simulator)",
     url="https://github.com/jxx123/simglucose",
     author="Jinyu Xie",
diff --git a/simglucose/__init__.py b/simglucose/__init__.py
index ea4ffe53..e69de29b 100644
--- a/simglucose/__init__.py
+++ b/simglucose/__init__.py
@@ -1,6 +0,0 @@
-from gym.envs.registration import register
-
-register(
-    id='simglucose-v0',
-    entry_point='simglucose.envs:T1DSimEnv',
-)
diff --git a/simglucose/envs/simglucose_gym_env.py b/simglucose/envs/simglucose_gym_env.py
index aab5e394..0bc8ca4f 100644
--- a/simglucose/envs/simglucose_gym_env.py
+++ b/simglucose/envs/simglucose_gym_env.py
@@ -12,10 +12,8 @@
 from datetime import datetime
 import gymnasium
 
-
 PATIENT_PARA_FILE = pkg_resources.resource_filename(
-    "simglucose", "params/vpatient_params.csv"
-)
+    "simglucose", "params/vpatient_params.csv")
 
 
 class T1DSimEnv(gym.Env):
@@ -28,9 +26,11 @@ class T1DSimEnv(gym.Env):
     SENSOR_HARDWARE = "Dexcom"
     INSULIN_PUMP_HARDWARE = "Insulet"
 
-    def __init__(
-        self, patient_name=None, custom_scenario=None, reward_fun=None, seed=None
-    ):
+    def __init__(self,
+                 patient_name=None,
+                 custom_scenario=None,
+                 reward_fun=None,
+                 seed=None):
         """
         patient_name must be 'adolescent#001' to 'adolescent#010',
         or 'adult#001' to 'adult#010', or 'child#001' to 'child#010'
@@ -79,20 +79,19 @@ def _create_env(self):
 
         if isinstance(self.patient_name, list):
             patient_name = self.np_random.choice(self.patient_name)
-            patient = T1DPatient.withName(patient_name, random_init_bg=True, seed=seed4)
+            patient = T1DPatient.withName(patient_name,
+                                          random_init_bg=True,
+                                          seed=seed4)
         else:
-            patient = T1DPatient.withName(
-                self.patient_name, random_init_bg=True, seed=seed4
-            )
+            patient = T1DPatient.withName(self.patient_name,
+                                          random_init_bg=True,
+                                          seed=seed4)
 
         if isinstance(self.custom_scenario, list):
             scenario = self.np_random.choice(self.custom_scenario)
         else:
-            scenario = (
-                RandomScenario(start_time=start_time, seed=seed3)
-                if self.custom_scenario is None
-                else self.custom_scenario
-            )
+            scenario = (RandomScenario(start_time=start_time, seed=seed3) if
+                        self.custom_scenario is None else self.custom_scenario)
 
         sensor = CGMSensor.withName(self.SENSOR_HARDWARE, seed=seed2)
         pump = InsulinPump.withName(self.INSULIN_PUMP_HARDWARE)
@@ -109,11 +108,11 @@ def _close(self):
     @property
     def action_space(self):
         ub = self.env.pump._params["max_basal"]
-        return spaces.Box(low=0, high=ub, shape=(1,))
+        return spaces.Box(low=0, high=ub, shape=(1, ))
 
     @property
     def observation_space(self):
-        return spaces.Box(low=0, high=1000, shape=(1,))
+        return spaces.Box(low=0, high=1000, shape=(1, ))
 
     @property
     def max_basal(self):
@@ -121,7 +120,7 @@ def max_basal(self):
 
 
 class T1DSimGymnaisumEnv(gymnasium.Env):
-    metadata = {"render_modes": ["human"]}
+    metadata = {"render_modes": ["human"], "render_fps": 60}
     MAX_BG = 1000
 
     def __init__(
@@ -140,12 +139,14 @@ def __init__(
             reward_fun=reward_fun,
             seed=seed,
         )
-        self.observation_space = gymnasium.spaces.Box(
-            low=0, high=self.MAX_BG, shape=(1,), dtype=np.float32
-        )
-        self.action_space = gymnasium.spaces.Box(
-            low=0, high=self.env.max_basal, shape=(1,), dtype=np.float32
-        )
+        self.observation_space = gymnasium.spaces.Box(low=0,
+                                                      high=self.MAX_BG,
+                                                      shape=(1, ),
+                                                      dtype=np.float32)
+        self.action_space = gymnasium.spaces.Box(low=0,
+                                                 high=self.env.max_basal,
+                                                 shape=(1, ),
+                                                 dtype=np.float32)
 
     def step(self, action):
         obs, reward, done, info = self.env.step(action)
@@ -159,7 +160,8 @@ def step(self, action):
         # )
         # Once the max_episode_steps is set, the truncated value will be overridden.
         truncated = False
-        return np.array([obs.CGM], dtype=np.float32), reward, done, truncated, info
+        return np.array([obs.CGM],
+                        dtype=np.float32), reward, done, truncated, info
 
     def reset(self, seed=None, options=None):
         super().reset(seed=seed)
diff --git a/simglucose/patient/t1dpatient.py b/simglucose/patient/t1dpatient.py
index 5c79506f..0cac02c5 100644
--- a/simglucose/patient/t1dpatient.py
+++ b/simglucose/patient/t1dpatient.py
@@ -246,7 +246,7 @@ def reset(self):
         Reset the patient state to default intial state
         '''
         if self._init_state is None:
-            self.init_state = self._params.iloc[2:15]
+            self.init_state = np.copy(self._params.iloc[2:15].values)
         else:
             self.init_state = self._init_state