diff --git a/requirements.txt b/requirements.txt
index 673490b..d356226 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,6 +2,6 @@
 # it exists to let GitHub build the repository dependency graph
 # https://help.github.com/en/github/visualizing-repository-data-with-graphs/listing-the-packages-that-a-repository-depends-on
 
-cartopy >= 0.18
-matplotlib >= 3.4
-numpy >= 1.17
+cartopy >= 0.20
+matplotlib >= 3.5
+numpy >= 1.23
diff --git a/setup.cfg b/setup.cfg
index c1b50b1..292f6ad 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -25,9 +25,9 @@ zip_safe = False  # https://mypy.readthedocs.io/en/latest/installed_packages.htm
 include_package_data = True
 python_requires = >=3.9
 install_requires =
-    cartopy >= 0.18
-    matplotlib >= 3.4
-    numpy >= 1.17
+    cartopy >= 0.20
+    matplotlib >= 3.5
+    numpy >= 1.23
 
 [tool:pytest]
 filterwarnings =