diff --git a/requirements-dev.txt b/requirements-dev.txt
index 8ba6a1d5a..fcbb193a0 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -52,7 +52,7 @@ pycodestyle==2.14.0 ; python_version >= "3.11" and python_version < "3.15"
 pyerfa==2.0.1.5 ; python_version >= "3.11" and python_version < "3.15"
 pygments==2.19.2 ; python_version >= "3.11" and python_version < "3.15"
 pyparsing==3.3.2 ; python_version >= "3.11" and python_version < "3.15"
-pyshtools==4.13.1 ; python_version >= "3.11" and python_version < "3.15"
+pyshtools==4.14.0 ; python_version >= "3.11" and python_version < "3.15"
 pytest==9.0.2 ; python_version >= "3.11" and python_version < "3.15"
 python-dateutil==2.9.0.post0 ; python_version >= "3.11" and python_version < "3.15"
 pytz==2025.2 ; python_version >= "3.11" and python_version < "3.15"
diff --git a/requirements.txt b/requirements.txt
index d3918d470..0aa319d98 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -20,7 +20,7 @@ platformdirs==4.9.2 ; python_version >= "3.11" and python_version < "3.15"
 pooch==1.9.0 ; python_version >= "3.11" and python_version < "3.15"
 pyerfa==2.0.1.5 ; python_version >= "3.11" and python_version < "3.15"
 pyparsing==3.3.2 ; python_version >= "3.11" and python_version < "3.15"
-pyshtools==4.13.1 ; python_version >= "3.11" and python_version < "3.15"
+pyshtools==4.14.0 ; python_version >= "3.11" and python_version < "3.15"
 python-dateutil==2.9.0.post0 ; python_version >= "3.11" and python_version < "3.15"
 pytz==2025.2 ; python_version >= "3.11" and python_version < "3.15"
 pyyaml==6.0.3 ; python_version >= "3.11" and python_version < "3.15"