diff --git a/gym_pybullet_drones/examples/learn.py b/gym_pybullet_drones/examples/learn.py
index 81ebf9e90..97c69d768 100644
--- a/gym_pybullet_drones/examples/learn.py
+++ b/gym_pybullet_drones/examples/learn.py
@@ -11,7 +11,7 @@
 Notes
 -----
 This is a minimal working example integrating `gym-pybullet-drones` with 
-reinforcement learning libraries `stable-baselines3`.
+reinforcement learning library `stable-baselines3`.
 
 """
 import time
@@ -367,4 +367,4 @@ def run(output_folder=DEFAULT_OUTPUT_FOLDER, gui=DEFAULT_GUI, plot=True, colab=D
 #     parser.add_argument('--output_folder',     default=DEFAULT_OUTPUT_FOLDER, type=str,           help='Folder where to save logs (default: "results")', metavar='')
 #     ARGS = parser.parse_args()
 
-#     run(**vars(ARGS))
\ No newline at end of file
+#     run(**vars(ARGS))