diff --git a/setup.cfg b/setup.cfg
index fde2ac6..74ef743 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -36,17 +36,17 @@ package_dir =
     =src
 
 # Require a min/specific Python version (comma-separated conditions)
-python_requires = >=3.6
+python_requires = >=3.7
 
 # PyPDF3: Read and write PDF files
 # Markdown: Render input markdown file to HTML
-# html5: Parse HTML file to generate bookmarks
+# html5lib: Parse HTML file to generate bookmarks
 # validators: Validate URL for fetching external PDF
 install_requires =
     importlib-metadata; python_version<"3.8"
     PyPDF3>=1.0.4
     Markdown>=3.3.4
-    html5>=0.0.9
+    html5lib>=1.1
     validators>=0.18.1
 
 [options.packages.find]