diff --git a/lerobot/common/robot_devices/cameras/intelrealsense.py b/lerobot/common/robot_devices/cameras/intelrealsense.py
index 7a21661a..3c3cf3c3 100644
--- a/lerobot/common/robot_devices/cameras/intelrealsense.py
+++ b/lerobot/common/robot_devices/cameras/intelrealsense.py
@@ -512,13 +512,13 @@ if __name__ == "__main__":
     )
     parser.add_argument(
         "--width",
-        type=str,
+        type=int,
         default=640,
         help="Set the width for all cameras. If not provided, use the default width of each camera.",
     )
     parser.add_argument(
         "--height",
-        type=str,
+        type=int,
         default=480,
         help="Set the height for all cameras. If not provided, use the default height of each camera.",
     )
diff --git a/lerobot/common/robot_devices/cameras/opencv.py b/lerobot/common/robot_devices/cameras/opencv.py
index f279f315..c9226805 100644
--- a/lerobot/common/robot_devices/cameras/opencv.py
+++ b/lerobot/common/robot_devices/cameras/opencv.py
@@ -492,13 +492,13 @@ if __name__ == "__main__":
     )
     parser.add_argument(
         "--width",
-        type=str,
+        type=int,
         default=None,
         help="Set the width for all cameras. If not provided, use the default width of each camera.",
     )
     parser.add_argument(
         "--height",
-        type=str,
+        type=int,
         default=None,
         help="Set the height for all cameras. If not provided, use the default height of each camera.",
     )