--- a/setup.py
+++ b/setup.py
@@ -24,7 +24,9 @@ from _datalad_build_support.setup import
 
 requires = {
     'core': [
-        'chardet>=3.0.4, <5.0.0',      # rarely used but small/omnipresent
+        # Debian: removed upper bound
+        # re-testing upstream in https://github.com/datalad/datalad/pull/7263
+        'chardet>=3.0.4',      # rarely used but small/omnipresent
         'colorama; platform_system=="Windows"',
         'distro; python_version >= "3.8"',
         'iso8601',
