diff --git a/poetry.lock b/poetry.lock
index e066bda..1e4e64b 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 = "fc9b5e0f33587039913d0c8ef60a259b6b42f2d15a177c67f99f5c260b2ec857"
+content-hash = "23fc5710d001a22cd48b730c7e35e51b9aac5b3dc13b99f29fbef00f19c0e364"
diff --git a/pyproject.toml b/pyproject.toml
index 6a347e3..d1b4c71 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,12 +18,13 @@ pylint = { version = "^2", markers = "python_version < '3.9'" }
 # scipy = { version = "^1", markers = "python_version < '3.9'" }
 # openpyxl = "^3.1.2"
 sympy = "^1.12"
-matplotlib = "^3.7.0"
+matplotlib = "*" # = "3.7.5"
 pillow = "9.5"
 scikit-learn = "1.3.2"
 # latest win32
 scipy = "1.9.1"
-numpy = { version = "^1", markers = "python_version < '3.9'" }
+numpy = "^1.20.3"
+
 
 
 [build-system]