2 files changed, 6 insertions, 6 deletions
diff --git a/docs/content/images.md b/docs/content/images.md
index f21010f0f..905ff337b 100644
--- a/docs/content/images.md
+++ b/docs/content/images.md
@@ -47,7 +47,7 @@ Add classes to an `<img>` element to easily style images in any project.
 
 ## Aligning images
 
-Align images with the [helper float classes]({{ site.baseurl }}/components/utilities/#responsive-floats) or [text alignment classes]({{ site.baseurl }}/components/utilities/#text-alignment). `block`-level images can be centered using [the `.m-x-auto` margin utility class]({{ site.baseurl }}/components/utilities/#horizontal-centering).
+Align images with the [helper float classes]({{ site.baseurl }}/components/utilities/#responsive-floats) or [text alignment classes]({{ site.baseurl }}/components/utilities/#text-alignment). `block`-level images can be centered using [the `.mx-auto` margin utility class]({{ site.baseurl }}/components/utilities/#horizontal-centering).
 
 <div class="bd-example bd-example-images">
   <img data-src="holder.js/200x200" class="img-rounded pull-xs-left" alt="A generic square placeholder image with rounded corners">
@@ -60,11 +60,11 @@ Align images with the [helper float classes]({{ site.baseurl }}/components/utili
 {% endhighlight %}
 
 <div class="bd-example bd-example-images">
-  <img data-src="holder.js/200x200" class="img-rounded m-x-auto d-block" alt="A generic square placeholder image with rounded corners">
+  <img data-src="holder.js/200x200" class="img-rounded mx-auto d-block" alt="A generic square placeholder image with rounded corners">
 </div>
 
 {% highlight html %}
-<img src="..." class="img-rounded m-x-auto d-block" alt="...">
+<img src="..." class="img-rounded mx-auto d-block" alt="...">
 {% endhighlight %}
 
 <div class="bd-example bd-example-images">
diff --git a/docs/content/typography.md b/docs/content/typography.md
index a59f50347..4a8e4c2d0 100644
--- a/docs/content/typography.md
+++ b/docs/content/typography.md
@@ -168,7 +168,7 @@ For quoting blocks of content from another source within your document. Wrap `<b
 
 {% example html %}
 <blockquote class="blockquote">
-  <p class="m-b-0">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat a ante.</p>
+  <p class="mb-0">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat a ante.</p>
 </blockquote>
 {% endexample %}
 
@@ -178,7 +178,7 @@ Add a `<footer class="blockquote-footer">` for identifying the source. Wrap the
 
 {% example html %}
 <blockquote class="blockquote">
-  <p class="m-b-0">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat a ante.</p>
+  <p class="mb-0">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat a ante.</p>
   <footer class="blockquote-footer">Someone famous in <cite title="Source Title">Source Title</cite></footer>
 </blockquote>
 {% endexample %}
@@ -189,7 +189,7 @@ Add `.blockquote-reverse` for a blockquote with right-aligned content.
 
 {% example html %}
 <blockquote class="blockquote blockquote-reverse">
-  <p class="m-b-0">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat a ante.</p>
+  <p class="mb-0">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat a ante.</p>
   <footer class="blockquote-footer">Someone famous in <cite title="Source Title">Source Title</cite></footer>
 </blockquote>
 {% endexample %}