diff --git a/pyproject.toml b/pyproject.toml
index 21b1b99..c67e622 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -20,16 +20,16 @@ packages = [{ include = "pagexml" }]
 [tool.poetry.dependencies]
 python = ">=3.8 <4.0"
 fuzzy-search = "^2.0.0a"
-matplotlib = "^3.7.0"
-numpy = "^1.22.3"
+matplotlib = ">=3.7.0"
+numpy = ">=1.22.3"
 pandas = ">=1.5.3 <3.0.0"
 py7zr = "^0.20.2"
 python-dateutil = "^2.8.2"
-scipy = "^1.7.0"
+pyyaml = "^6.0"
+scipy = ">=1.7.0"
 seaborn = "^0.13.0"
 tqdm = "^4.64.1"
 xmltodict = "^0.13.0"
-pyyaml = "^6.0"
 
 [tool.poetry.dev-dependencies]
 
diff --git a/tests/physical_document_model_test.py b/tests/physical_document_model_test.py
index 77fb646..3d38d7e 100644
--- a/tests/physical_document_model_test.py
+++ b/tests/physical_document_model_test.py
@@ -51,7 +51,7 @@ def test_list_of_line_point_coords_to_hull_of_coords(self):
                 self.assertIn(point, hull_coords.points)
 
     def test_valid_points_from_str(self):
-        coords = Coords('1216,1119 1205,1109 1202,1109 1198,1112 1195,1112 1191,1116 1164,1116 1160,1119 1147,1119'
+        coords = pdm.Coords('1216,1119 1205,1109 1202,1109 1198,1112 1195,1112 1191,1116 1164,1116 1160,1119 1147,1119'
                         ' 1143,1123 1126,1123 1123,1126 1102,1126 1098,1130 1074,1130 1071,1133 1016,1133 1012,1136'
                         ' 964,1136 961,1140 957,1140 954,1143 940,1143 937,1147 930,1147 926,1150 916,1150 912,1154'
                         ' 899,1154 895,1157 888,1157 885,1160 882,1160 878,1164 875,1164 857,1181 847,1181 840,1188'