diff --git a/pyproject.toml b/pyproject.toml
index 0c8c207e..2f9959f3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -57,7 +57,7 @@ classifiers = [
     "Development Status :: 4 - Beta",
     "Intended Audience :: Science/Research",
     "Intended Audience :: Developers",
-    "OSI Approved :: GNU Lesser General Public License v3 (LGPLv3)",
+    "License :: OSI Approved :: GNU Lesser General Public License v3 (LGPLv3)",
     "Programming Language :: C++",
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3.8",