diff --git a/src/rougail/annotator/__init__.py b/src/rougail/annotator/__init__.py
index ba1bfec7..ce10edf5 100644
--- a/src/rougail/annotator/__init__.py
+++ b/src/rougail/annotator/__init__.py
@@ -26,12 +26,27 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 """
 from .variable import CONVERT_OPTION
 import importlib.resources
+from os.path import dirname, join
 from ..utils import load_modules
 
 
 ANNOTATORS = None
 
 
+if not 'files' in dir(importlib.resources):
+    # old python version
+    class fake_files:
+        def __init__(self, package):
+            self.mod = []
+            dir_package = dirname(importlib.resources._get_package(package).__file__)
+            for mod in importlib.resources.contents(package):
+                self.mod.append(join(dir_package, mod))
+
+        def iterdir(self):
+            return self.mod
+    importlib.resources.files = fake_files
+
+
 def get_level(module):
     return module.level