diff --git a/requirements-dev.txt b/requirements-dev.txt
index 0257a7f8..0cb5237e 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -55,7 +55,7 @@ pyparsing==3.3.2 ; 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"
+pytz==2026.1.post1 ; python_version >= "3.11" and python_version < "3.15"
 pyyaml==6.0.3 ; python_version >= "3.11" and python_version < "3.15"
 requests==2.32.5 ; python_version >= "3.11" and python_version < "3.15"
 scipy==1.17.0 ; python_version >= "3.11" and python_version < "3.15"
diff --git a/requirements.txt b/requirements.txt
index ddee4250..8a81c23f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,7 +22,7 @@ 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==4.14.0 ; 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"
+pytz==2026.1.post1 ; python_version >= "3.11" and python_version < "3.15"
 pyyaml==6.0.3 ; python_version >= "3.11" and python_version < "3.15"
 requests==2.32.5 ; python_version >= "3.11" and python_version < "3.15"
 scipy==1.17.0 ; python_version >= "3.11" and python_version < "3.15"