diff --git a/pyproject.toml b/pyproject.toml
index b014d7af2..c7ed830f5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,6 +14,7 @@ classifiers = [
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
 ]
 dependencies = [
     "pandas",
@@ -37,7 +38,7 @@ test = ["netCDF4"]
 [build-system]
 requires = [
     "pandas",
-    "numpy>=1.20",
+    "numpy>=1.22",
     "numpy_groupies>=0.9.19",
     "toolz",
     "setuptools>=61.0.0",