diff -rupN lunr.py-0.6.0/setup.py lunr.py-0.6.0-new/setup.py
--- lunr.py-0.6.0/setup.py	2021-04-22 12:13:30.000000000 +0200
+++ lunr.py-0.6.0-new/setup.py	2021-10-08 09:23:37.143568652 +0200
@@ -40,10 +40,7 @@ setup(
     python_requires=">=3.6",
     install_requires=[],
     extras_require={
-        # NLTK 3.5 requires regex which does not ship with all types of wheels
-        # and causes installation issues in mkdocs upstream
-        # https://github.com/mkdocs/mkdocs/issues/2062
-        "languages": ["nltk>=3.2.5,<3.5"]
+        "languages": ["nltk>=3.2.5"]
     },
     keywords="lunr full text search",
     classifiers=[