diff --git a/updates_autogeneration_plugin/plugin.py b/updates_autogeneration_plugin/plugin.py
index 2a7a05418fef20eb284671fed67e92fa559b9a2d..6cdc31a7b8638c26a0b2f779fb0eb6b1d0360f55 100644
--- a/updates_autogeneration_plugin/plugin.py
+++ b/updates_autogeneration_plugin/plugin.py
@@ -11,9 +11,9 @@ from mkdocs.utils import nest_paths
 from mkdocs.structure.nav import Navigation, Section, Page, \
     _get_by_type, _add_parent_links, _data_to_navigation
 
-# Files need to be in YYYYMMDD.md format, on the root of the configured path for autogeneration,
-# i.e. updates/c8/20200101.md
-FILE_NAME_REGEX = re.compile(r'.+\/(\d*)\.md')
+# Files need to be in YYYYMMDD.html format, on the root of the configured path for autogeneration,
+# i.e. updates/c8/20200101.html
+FILE_NAME_REGEX = re.compile(r'.+\/(\d*)\.html')
 # Exclude pages like updates/slc6/test/latest_updates/ from having footer links,
 # previous and next do not make sense here
 REGEX_EXCLUDE_FOOTER_LINKS = re.compile(r'updates/.+\/.+\/latest_updates\/')
@@ -28,12 +28,12 @@ plugins:
         - AUTOGENERATE_C8_PROD:
             section_name: Production
             path: updates/c8/prod/
-            # This template will be used for the latest_updates.md final result. It is optional
+            # This template will be used for the latest_updates.html final result. It is optional
             template_path: updates/prod.tpl
         - AUTOGENERATE_C8_TEST:
             section_name: Testing
             path: updates/c8/test/
-            # This template will be used for the latest_updates.md final result. It is optional
+            # This template will be used for the latest_updates.html final result. It is optional
             template_path: updates/test.tpl
       autogenerate_sitemap: true
   - search:
@@ -92,7 +92,7 @@ class UpdatesAutogenerationPlugin(BasePlugin):
 
                 # This markdown File has the combined result of all monthly updates, concat in a single file
                 combined_file_path = os.path.join(section_plugin_config['path'],
-                                                  year_title, month_numeric, "monthly_updates.md")
+                                                  year_title, month_numeric, "monthly_updates.html")
 
                 docs_combined_file_path = os.path.join(config['docs_dir'], combined_file_path)
                 if not os.path.exists(os.path.dirname(docs_combined_file_path)):
@@ -131,7 +131,7 @@ class UpdatesAutogenerationPlugin(BasePlugin):
     def build_last_updates(self, section_plugin_config, config, files, file_dates):
 
         # This markdown File has the combined result of all monthly updates, concat in a single file
-        combined_file_path = os.path.join(section_plugin_config['path'], "latest_updates.md")
+        combined_file_path = os.path.join(section_plugin_config['path'], "latest_updates.html")
 
         docs_combined_file_path = os.path.join(config['docs_dir'], combined_file_path)
         if not os.path.exists(os.path.dirname(docs_combined_file_path)):
@@ -220,7 +220,7 @@ class UpdatesAutogenerationPlugin(BasePlugin):
         nav = Navigation(items, pages)
 
         # This markdown File has the sitemap with all pages, even if not present on the nav
-        sitemap_file_path = os.path.join("sitemap", "index.md")
+        sitemap_file_path = os.path.join("sitemap", "index.html")
         docs_sitemap_file_path = os.path.join(config['docs_dir'], sitemap_file_path)
         if not os.path.exists(os.path.dirname(docs_sitemap_file_path)):
             try:
@@ -236,7 +236,7 @@ class UpdatesAutogenerationPlugin(BasePlugin):
 
         return file_sitemap
 
-    # After a build, we should regenerate our nav according to the provided .md files.
+    # After a build, we should regenerate our nav according to the provided .html files.
     def on_nav(self, nav: Navigation, config: Config, files: Files):
         # Generate new nav based on the config['nav'] plus autogenerate the specified path
         nav.items = self._process_nav_items_recursive(nav, self.config, config, files)