diff --git a/pyproject.toml b/pyproject.toml
index 024a16023..3cc3f58a8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,6 +24,7 @@ classifiers = [
   "Programming Language :: Python :: Implementation :: CPython",
   "Programming Language :: Python :: Implementation :: PyPy",
   "Typing :: Typed",
+  "License :: OSI Approved :: MIT License",
 ]
 dependencies = []
 dynamic = ["version", "readme"]