diff --git a/README.md b/README.md
index deb012e..adcfee7 100644
--- a/README.md
+++ b/README.md
@@ -43,9 +43,9 @@ Amperize is build to convert the `
` part of your HTML. It will **not** cre
**[`` reference](https://ampbyexample.com/components/amp-img/)**
-Amperize will convert common `` tags into AMP HTML conform `` tags. With the sub-dependency [`image-size`](https://github.com/image-size/image-size), Amperize will fetch the necessary `width` and `height` properties for the given image.
+Amperize will convert common `` tags into AMP HTML conform `` tags. With the sub-dependencies [`probe-image-size](https://github.com/nodeca/probe-image-size) and [`image-size`](https://github.com/image-size/image-size), Amperize will fetch the necessary `width` and `height` properties for the given image.
-It will fall back to the default values `width: 600` and `height: 400`, if the dimensions couldn't get fetched.
+It will fall back to the default values `width: 600` and `height: 400`, if the dimensions couldn't be fetched.
If any other error occurs (eg. missing `src` property), Amperize will not transform the tag and return the original.
@@ -59,13 +59,13 @@ When the `` tag that needs to be transformed, is a `.gif` animation, Amperi
**[`` reference](https://ampbyexample.com/components/amp-iframe/)**
-Amperize converts iFrames like embedded videos from YouTube, Vimeo, etc. into `` tags.
+Amperize converts iFrames like embedded videos from YouTube, Vimeo, etc. into `` tags. If the `src` attribute is an `http` URL it will be switched to `https` in order to pass AMP validation.
### ``
**[`` reference](https://ampbyexample.com/components/amp-audio/)**
-Converts HTML `