diff --git a/pyproject.toml b/pyproject.toml
index a9c2f7ec..66b54667 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -20,7 +20,7 @@ classifiers = [
         "License :: OSI Approved :: GNU General Public License v3 (GPLv3)",
         "Natural Language :: English",
         "Operating System :: POSIX :: Linux",
-        "Programming Language :: Python :: 3",
+        "Programming Language :: Python :: 3 :: Only",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",