diff --git a/requirements-dev.txt b/requirements-dev.txt
index f4fea19b1..3e4b0e227 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,4 +1,4 @@
-astropy-iers-data==0.2025.12.22.0.40.30 ; python_version >= "3.11" and python_version < "3.15"
+astropy-iers-data==0.2025.12.29.0.42.34 ; python_version >= "3.11" and python_version < "3.15"
 astropy==7.2.0 ; python_version >= "3.11" and python_version < "3.15"
 autograd==1.8.0 ; python_version >= "3.11" and python_version < "3.15"
 autopep8==2.3.2 ; python_version >= "3.11" and python_version < "3.15"
diff --git a/requirements.txt b/requirements.txt
index cb3ce8643..9948f6dc7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-astropy-iers-data==0.2025.12.22.0.40.30 ; python_version >= "3.11" and python_version < "3.15"
+astropy-iers-data==0.2025.12.29.0.42.34 ; python_version >= "3.11" and python_version < "3.15"
 astropy==7.2.0 ; python_version >= "3.11" and python_version < "3.15"
 bayesian-filters==1.4.5 ; python_version >= "3.11" and python_version < "3.15"
 beartype==0.22.9 ; python_version >= "3.11" and python_version < "3.15"