diff --git a/htrvx/testing.py b/htrvx/testing.py
index 83b7807..d892b47 100644
--- a/htrvx/testing.py
+++ b/htrvx/testing.py
@@ -1,5 +1,9 @@
 from collections import defaultdict
-from typing import Iterable, List, Literal, Dict, Optional, Tuple, Union, IO
+from typing import Iterable, List, Dict, Optional, Tuple, Union, IO
+try:
+    from typing import Literal
+except ImportError:
+    from typing_extensions import Literal
 
 import click
 from lxml import etree
diff --git a/setup.py b/setup.py
index 54aa7af..fa07ad7 100644
--- a/setup.py
+++ b/setup.py
@@ -19,7 +19,7 @@
 URL = 'https://github.com/htr-united/htrvx'
 AUTHOR = 'Thibault Clérice & Ariane Pinche'
 REQUIRES_PYTHON = '>=3.6.0'
-VERSION = "0.0.13"
+VERSION = "0.0.14"
 
 # What packages are required for this module to be executed?
 
@@ -28,8 +28,10 @@
 
 # What packages are optional?
 EXTRAS = {
-    # 'fancy feature': ['django'],
+    ":python_version<'3.8'": ["typing_extensions"]
 }
+    # 'fancy feature': ['django'],
+#}
 
 # The rest you shouldn't have to touch too much :)
 # ------------------------------------------------