diff --git a/requirements.txt b/requirements.txt
index 69d0f0d2..5159ca43 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@ pyscf
 sphinx
 sphinxcontrib-bibtex
 nbsphinx
-Pygments==2.15.0
+Pygments==2.20.0
 # MarkupSafe 2.1.1 breaks Jinja2 2.10.1
 MarkupSafe==2.0.1
 pydata-sphinx-theme