diff --git a/pyproject.toml b/pyproject.toml
index 38a2a5c..c11f6ec 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,6 +23,8 @@ classifiers = [
   "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",
   "Programming Language :: Python :: 3.12",
+  "License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)",
+  "Operating System :: POSIX :: Linux",
 ]
 
 [project.urls]