diff --git a/REQUIREMENTS.txt b/REQUIREMENTS.txt
index 0052fe076c..373177d0e3 100644
--- a/REQUIREMENTS.txt
+++ b/REQUIREMENTS.txt
@@ -1,4 +1,5 @@
 icalendar
+myst-parser==3.0.1
 pdflatex
 pyYAML
 requests==2.25.1