diff --git a/pyproject.toml b/pyproject.toml
index 405d3e7..8333f92 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,14 +4,23 @@ description = "Management of simple tags within file names"
 # readme = "README.org"
 version = "2025.09.02.1"
 keywords = ["tagging", "tags", "file managing", "file management", "files", "tagtrees", "tagstore", "tag-based navigation", "tag-based filter"]
+
+# sequence along https://pypi.org/classifiers
 classifiers=[
-    "Programming Language :: Python :: 3 :: Only",
     "Development Status :: 5 - Production/Stable",
     "Environment :: Console",
     "Intended Audience :: End Users/Desktop",
-    "License :: OSI Approved :: GNU General Public License (GPL)",
+    "License :: OSI Approved :: GNU General Public License v3 (GPLv3)",
     "Operating System :: OS Independent",
+    "Programming Language :: Python",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3 :: Only",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
     ]
+
 authors = [{name="Karl Voit", email="tools@Karl-Voit.at"}]
 license = {file = "LICENSE.txt"}
 requires-python = ">=3.10"  # see https://devguide.python.org/versions/