diff --git a/tutorial/tutorial-1.md b/tutorial/tutorial-1.md
index 4845ba41..bcae5856 100644
--- a/tutorial/tutorial-1.md
+++ b/tutorial/tutorial-1.md
@@ -214,7 +214,7 @@ pub fn register(plugin: &gst::Plugin) -> Result<(), glib::BoolError> {
 
 This defines a Rust wrapper type for our element subclass. This is similar to `gst::Element` and others and provides the public interface to our element.
 
-In addition, we also define a `register` function (the one that is already called from our `plugin_init` function). When `register` function is called it registers the element factory with GStreamer based on the type ID, to be able to create new instances of it with the name “rsrgb2gray” (e.g. when using [`gst::ElementFactory::make`](https://gstreamer.pages.freedesktop.org/gstreamer-rs/gstreamer/struct.ElementFactory.html#method.make)). The `static_type` function will register the type with the GObject type system on the first call and the next time it's called (or on all the following calls) it will return the type ID.
+In addition, we also define a `register` function (the one that is already called from our `plugin_init` function). When `register` function is called it registers the element factory with GStreamer based on the type ID, to be able to create new instances of it with the name “rsrgb2gray” (e.g. when using [`gst::ElementFactory::make`](https://gstreamer.pages.freedesktop.org/gstreamer-rs/stable/latest/docs/gstreamer/struct.ElementFactory.html#method.make)). The `static_type` function will register the type with the GObject type system on the first call and the next time it's called (or on all the following calls) it will return the type ID.
 
 
 ## Type Class & Instance Initialization
@@ -261,7 +261,7 @@ impl BaseTransformImpl for Rgb2Gray {
 }
 ```
 
-In the `metadata` function we set up `ElementMetadata` structure for our new element. In this case it contains a description, a classification of our element, a longer description and the author. The metadata can later be retrieved and made use of via the [`Registry`](https://gstreamer.pages.freedesktop.org/gstreamer-rs/gstreamer/struct.Registry.html) and [`PluginFeature`](https://gstreamer.pages.freedesktop.org/gstreamer-rs/gstreamer/struct.PluginFeature.html)/[`ElementFactory`](https://gstreamer.pages.freedesktop.org/gstreamer-rs/gstreamer/struct.ElementFactory.html) API. We employ the `once_cell::sync::Lazy` type from the `once_cell` crate here. This type allows to declare lazily initialized global variables, i.e. on the very first use the provided code will be executed and the result will be stored for all later uses.
+In the `metadata` function we set up `ElementMetadata` structure for our new element. In this case it contains a description, a classification of our element, a longer description and the author. The metadata can later be retrieved and made use of via the [`Registry`](https://gstreamer.pages.freedesktop.org/gstreamer-rs/stable/latest/docs/gstreamer/struct.Registry.html) and [`PluginFeature`](https://gstreamer.pages.freedesktop.org/gstreamer-rs/stable/latest/docs/gstreamer/struct.PluginFeature.html)/[`ElementFactory`](https://gstreamer.pages.freedesktop.org/gstreamer-rs/stable/latest/docs/gstreamer/struct.ElementFactory.html) API. We employ the `once_cell::sync::Lazy` type from the `once_cell` crate here. This type allows to declare lazily initialized global variables, i.e. on the very first use the provided code will be executed and the result will be stored for all later uses.
 
 We also implement the required `BaseTransformImpl` trait items, which define that we will never operate in-place (producing our output in the input buffer), and that we don’t want to work in passthrough mode if the input/output formats are the same.