diff --git a/pelican/server.py b/pelican/server.py
index 7a183bce..913c3761 100644
--- a/pelican/server.py
+++ b/pelican/server.py
@@ -43,19 +43,16 @@ def parse_arguments():
 class ComplexHTTPRequestHandler(server.SimpleHTTPRequestHandler):
     SUFFIXES = ['.html', '/index.html', '/', '']
 
-    extensions_map = _encodings_map_default = {
-        # included in Python default implementation
-        '.gz': 'application/gzip',
-        '.Z': 'application/octet-stream',
-        '.bz2': 'application/x-bzip2',
-        '.xz': 'application/x-xz',
-
-        # web fonts
-        ".oft": "font/oft",
-        ".sfnt": "font/sfnt",
-        ".ttf": "font/ttf",
-        ".woff": "font/woff",
-        ".woff2": "font/woff2",
+    extensions_map = {
+        **server.SimpleHTTPRequestHandler.extensions_map,
+        ** {
+            # web fonts
+            ".oft": "font/oft",
+            ".sfnt": "font/sfnt",
+            ".ttf": "font/ttf",
+            ".woff": "font/woff",
+            ".woff2": "font/woff2",
+        },
     }
 
     def translate_path(self, path):