diff --git a/setup.cfg b/setup.cfg
index 1cc8775..7b59b36 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -38,16 +38,15 @@ package_dir =
 # Require a min/specific Python version (comma-separated conditions)
 python_requires = >=3.6
 
+# PyPDF3: Read and write PDF files
+# Markdown: Render input markdown file to HTML
+# html5: Parse HTML file to generate bookmarks
 install_requires =
     importlib-metadata; python_version<"3.8"
-    # Read and write bookmarks from PDF
-    PyPDF3>=1.0.4 
-    # Read the input file and convert it to HTML
+    PyPDF3>=1.0.4
     Markdown>=3.3.4
-    # Parse the HTML to generate bookmarks
     html5>=0.0.9
 
-
 [options.packages.find]
 where = src
 exclude =