diff --git a/nbsphinx_link/__init__.py b/nbsphinx_link/__init__.py
index 792bd0e..366ea88 100644
--- a/nbsphinx_link/__init__.py
+++ b/nbsphinx_link/__init__.py
@@ -29,7 +29,6 @@
 from nbsphinx import NotebookParser, NotebookError, _ipynbversion
 import nbformat
 from sphinx.util.logging import getLogger
-
 from ._version import __version__
 
 
@@ -189,7 +188,6 @@ def parse(self, inputstring, document):
 
         abs_path = os.path.normpath(os.path.join(source_dir, link['path']))
         path = utils.relative_path(None, abs_path)
-        path = nodes.reprunicode(path)
 
         extra_media = link.get('extra-media', None)
         if extra_media:
@@ -199,8 +197,7 @@ def parse(self, inputstring, document):
         register_dependency(path, document)
 
         target_root = env.config.nbsphinx_link_target_root
-        target = utils.relative_path(target_root, abs_path)
-        target = nodes.reprunicode(target).replace(os.path.sep, '/')
+        target = utils.relative_path(target_root, abs_path).replace(os.path.sep, '/')
         env.metadata[env.docname]['nbsphinx-link-target'] = target
 
         # Copy parser from nbsphinx for our cutom format
diff --git a/setup.py b/setup.py
index d12cea4..ff43b93 100644
--- a/setup.py
+++ b/setup.py
@@ -28,16 +28,19 @@
     license         = 'BSD-3',
     platforms       = "Linux, Mac OS X, Windows",
     keywords        = ['Interactive', 'Interpreter', 'Shell', 'Web'],
-    classifiers     = [
+    classifiers=[
         'Intended Audience :: Developers',
         'License :: OSI Approved :: BSD License',
         'Programming Language :: Python',
-        'Programming Language :: Python :: 2.7',
-        'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.4',
-        'Programming Language :: Python :: 3.5',
-        'Programming Language :: Python :: 3.6',
+        "Programming Language :: Python :: 3",
+        "Programming Language :: Python :: 3.7",
+        "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.9",
+        "Programming Language :: Python :: 3.10",
+        "Programming Language :: Python :: 3.11",
+        "Programming Language :: Python :: 3.12",
     ],
+    python_requires=">=3",
     install_requires = [
         'nbsphinx',
         'sphinx>=1.8',