diff --git a/pyproject.toml b/pyproject.toml
index 8c34d49..0e231e2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,6 +15,14 @@ authors = [
     {name = "Pangeo developers", email = "ryan.abernathey@gmail.com"},
 ]
 requires-python = ">=3.8"
+classifiers = [
+  "Programming Language :: Python :: 3 :: Only",
+  "Programming Language :: Python :: 3.8",
+  "Programming Language :: Python :: 3.9",
+  "Programming Language :: Python :: 3.10",
+  "Programming Language :: Python :: 3.11",
+  "Programming Language :: Python :: 3.12",
+]
 dynamic = [
   "version",
 ]