diff --git a/requirements.txt b/requirements.txt
index 456d75add..3b14bca1d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -33,6 +33,7 @@ pillow
 pycparser
 pyHanko
 pyhanko-certvalidator
+PyMuPDF
 pypdf
 pypng
 python-bidi