diff --git a/docs/source/tutorials/code/room_env.py b/docs/source/tutorials/code/room_env.py
index a4337bf9..2e8420b7 100644
--- a/docs/source/tutorials/code/room_env.py
+++ b/docs/source/tutorials/code/room_env.py
@@ -63,7 +63,7 @@ def step(self, action):
         elif action == 3:
             movement[0] += 0.1
         else:
-            assert ValueError('The environment has only 4 actions')
+            raise ValueError('The environment has only 4 actions')
 
         # Apply the movement with some noise:
         self._state += movement + np.random.randn(2)*0.05
diff --git a/mushroom_rl/__init__.py b/mushroom_rl/__init__.py
index 4e2fb170..c2950efb 100644
--- a/mushroom_rl/__init__.py
+++ b/mushroom_rl/__init__.py
@@ -1 +1 @@
-__version__ = '2.0.0-rc1'
+__version__ = '2.0.0-rc1'
\ No newline at end of file