diff --git a/requirements.txt b/requirements.txt
index 921cd4b..be5f40d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -26,7 +26,7 @@ pydantic-settings
 python-multipart
 markitdown[pdf,docx,pptx,xlsx,outlook]==0.1.3
 PyPDF2==3.0.1
-#PyQt6==6.9.1
+#PyQt6==6.9.1 # uncomment for calibre, it uses the webengine
 #PyQt6-Qt6==6.9.2
 #PyQt6-WebEngine==6.9.0
 #PyQt6-WebEngine-Qt6==6.9.2