diff --git a/CHANGELOG.md b/CHANGELOG.md
index a3599f28b..ae7611524 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,11 @@ https://semver.org/spec/v2.0.0.html
 
 ## [Unreleased]
 
+### Changed
+- Update library dependencies:
+  - Upgrade upper limit for `numpy` to 2.5.
+  - Upgrade upper limit for `packaging` to 27.0.
+
 ## [2.0.0] - 2025-06-13
 
 ### Added
diff --git a/dep/requirements.txt b/dep/requirements.txt
index 00759f0d2..68870cb03 100644
--- a/dep/requirements.txt
+++ b/dep/requirements.txt
@@ -1,7 +1,7 @@
 basemap_data >= 2.0, < 3.0
-packaging >= 20.5, < 26.0
+packaging >= 20.5, < 27.0
 
-numpy >= 2.0, < 2.4
+numpy >= 2.0, < 2.5
 matplotlib >= 3.4, < 3.11
 
 pyproj >= 3.0, < 3.8
diff --git a/src/mpl_toolkits/basemap/__init__.py b/src/mpl_toolkits/basemap/__init__.py
index 46458b95b..d5f344f51 100644
--- a/src/mpl_toolkits/basemap/__init__.py
+++ b/src/mpl_toolkits/basemap/__init__.py
@@ -1304,8 +1304,7 @@ def _readboundarydata(self,name,as_polygons=False):
                 # numpy array (first column is lons, second is lats).
                 polystring = bdatfile.read(bytecount)
                 # binary data is little endian.
-                b = np.array(np.frombuffer(polystring,dtype='<f4'),'f8')
-                b.shape = (npts,2)
+                b = np.array(np.frombuffer(polystring,dtype='<f4'),'f8').reshape(npts, 2)
                 b2 = b.copy()
                 # merge polygons that cross dateline.
                 poly = Shape(b)