diff --git a/slides/chapter-13.en.md b/slides/chapter-13.en.md
index f1c4206..d032ff8 100644
--- a/slides/chapter-13.en.md
+++ b/slides/chapter-13.en.md
@@ -19,11 +19,11 @@ Footnotes are automatically numbered consecutively, independent of sections.
(Here, `hyperref` is used for the `\url` command, it is not necessary for footnotes per se.)
``` {.hljs .lang-tex}
-The wild boar (Sus scrofa), also known as
-the wild swine, common wild pig, or
-simply wild pig, is a suid native to much
-of Eurasia and North Africa, and has been
-introduced to the Americas and Oceania.
+The wild boar (\textit{Sus scrofa}), also
+known as the wild swine, common wild pig,
+or simply wild pig, is a suid native to
+much of Eurasia and North Africa, and has
+been introduced to the Americas and Oceania.
\footnote{\url{https://en.wikipedia.org/
wiki/Wild_boar}}
```
diff --git a/svg/chapter-13/footnote-example-crop.svg b/svg/chapter-13/footnote-example-crop.svg
index 1384c28..a6fc25d 100644
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+++ b/svg/chapter-13/footnote-example-crop.svg
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diff --git a/svg/chapter-13/footnote-example-orig.svg b/svg/chapter-13/footnote-example-orig.svg
index b1eea79..648e695 100644
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+++ b/svg/chapter-13/footnote-example-orig.svg
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diff --git a/svg/chapter-13/footnote-example.tex b/svg/chapter-13/footnote-example.tex
index 0b47cd5..d4b8cbd 100644
--- a/svg/chapter-13/footnote-example.tex
+++ b/svg/chapter-13/footnote-example.tex
@@ -7,6 +7,6 @@
\thispagestyle{empty}
\vspace*{18.5cm}
-The wild boar (Sus scrofa), also known as the wild swine, common wild pig, or simply wild pig, is a suid native to much of Eurasia and North Africa, and has been introduced to the Americas and Oceania.\footnote{\url{https://en.wikipedia.org/wiki/Wild_boar}}
+The wild boar (\textit{Sus scrofa}), also known as the wild swine, common wild pig, or simply wild pig, is a suid native to much of Eurasia and North Africa, and has been introduced to the Americas and Oceania.\footnote{\url{https://en.wikipedia.org/wiki/Wild_boar}}
\end{document}