diff --git a/poetry.lock b/poetry.lock
index 2152d82..e066bda 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1350,4 +1350,4 @@ testing = ["big-O", "jaraco.functools", "jaraco.itertools", "more-itertools", "p
 [metadata]
 lock-version = "2.0"
 python-versions = ">=3.8,<3.9"
-content-hash = "286d32363f9d7a637ccb5acb285261e0fe1622068963ba30922706f88744746c"
+content-hash = "fc9b5e0f33587039913d0c8ef60a259b6b42f2d15a177c67f99f5c260b2ec857"
diff --git a/pyproject.toml b/pyproject.toml
index 97aeac2..6a347e3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,6 +23,7 @@ pillow = "9.5"
 scikit-learn = "1.3.2"
 # latest win32
 scipy = "1.9.1"
+numpy = { version = "^1", markers = "python_version < '3.9'" }
 
 
 [build-system]