diff --git a/pyproject.toml b/pyproject.toml
index ee875c3..c0c73fd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,7 +10,6 @@ requires-python = ">=3.10"
 license = { text = "BSD" }
 keywords = []
 classifiers = [
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",