diff --git a/requirements.txt b/requirements.txt
index bd2f8a4..0ef53aa 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,4 +15,4 @@ ebooklib>=0.20
 # external entities by default, allowing crafted DOCX/PPTX/EPUB/PDF-XMP
 # files to read arbitrary local files).
 lxml>=6.1.0
-pyinstaller>=6.20.0
+pyinstaller>=6.21.0