diff --git a/pyproject.toml b/pyproject.toml
index fcc5378..db25552 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -37,7 +37,7 @@ classifiers = [
 ]
 
 dependencies = [
-    "numpy >=1.13.0, <2",
+    "numpy >=1.13.0, <2.1",
     "cpyparsing >=2.4.7, <=2.5",
     "platformdirs >=3, <=5",
     "dataclasses_json >=0.6, <=1.0",
diff --git a/tests/strings_test.py b/tests/strings_test.py
index 05e7b44..71e50de 100644
--- a/tests/strings_test.py
+++ b/tests/strings_test.py
@@ -100,7 +100,7 @@ def test_str_alloc_sub_realloc(self):
 
     def test_str_array_type_chceck(self):
         with pytest.raises(TypeError) as cm:
-            x.a_str_exp_1d = np.zeros(5, dtype=np.unicode_)
+            x.a_str_exp_1d = np.zeros(5, dtype=np.str_)
 
     def test_str_func_inout_str(self, capfd):
         z = np.array(