diff --git a/slides/chapter-01.en.md b/slides/chapter-01.en.md
index e55782c..49ac470 100644
--- a/slides/chapter-01.en.md
+++ b/slides/chapter-01.en.md
@@ -24,7 +24,7 @@ svg/chapter-01/example-latex-orig.svg
 Origin
 
 @content
-* Donald **Knuth**, 1977–1986: typesetting system **TeX**<span class="bubble fragment">τεχ → /tɛç, tɛx, tɛk/</span> for The Art of Computer Programming
+* Donald **Knuth**, 1977–1986: typesetting system **TeX**<span class="bubble fragment" style="margin-top: -3em;">τεχ → /tɛç, tɛx, tɛk/</span> for The Art of Computer Programming
 * Leslie **Lamport**, from 1980s: software package **LaTeX** made TeX easier to use
 
 <div style="display: flex; justify-content: space-between; align-items: stretch;">