diff --git a/slides/intro.en.md b/slides/intro.en.md
index ef971a2..c411894 100644
--- a/slides/intro.en.md
+++ b/slides/intro.en.md
@@ -1,7 +1,7 @@
 @slide(layout=chapter-slide)
 
 @title
-First steps with&nbsp;L<sup style="font-weight: bold; font-size: 73%; margin-left: -.25em; margin-right: -.05em; position: relative; top: .2em">A</sup>T<sub style="font-size: 100%; margin-left: -.1em">E</sub>X
+0 First steps with&nbsp;L<sup style="font-weight: bold; font-size: 73%; margin-left: -.25em; margin-right: -.05em; position: relative; top: .2em">A</sup>T<sub style="font-size: 100%; margin-left: -.1em">E</sub>X
 
 @content
 In order to compile the script for this tutorial, a few steps have to be followed, which are explained in the next slides.
@@ -114,7 +114,7 @@ Passing the flag ``--shell-escape`` to your compiler can be a potential security
 
 @slide(layout=content-and-preview)
 @title
-0 Change the listings mode
+Change the listings mode
 
 @content
 In order to compile the script using `minted`, the listings mode has to be changed.