diff --git a/constraints.txt b/constraints.txt
index 7f547d7bea..45dad3fe40 100644
--- a/constraints.txt
+++ b/constraints.txt
@@ -1,6 +1,6 @@
 # Constraints generated by tools/freeze-constraints.sh
 anyio==4.9.0
-Babel==2.12.1
+Babel==2.18.0
 backports.ssl-match-hostname==3.7.0.1
 bcrypt==4.3.0
 beautifulsoup4==4.13.4
diff --git a/pyproject.toml b/pyproject.toml
index 3d994b04aa..1cc9bccb17 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -29,7 +29,7 @@ dependencies = [
     "patool>=1.12,<4.1",      # https://github.com/wummel/patool/blob/master/doc/changelog.txt
     "bcrypt>=3.1,<4.4",       # https://github.com/pyca/bcrypt/
     "chardet>=3.0,<5.3",      # https://pypi.python.org/pypi/chardet
-    "babel==2.12.1",          # http://babel.pocoo.org/en/latest/changelog.html
+    "babel==2.18.0",          # http://babel.pocoo.org/en/latest/changelog.html
     "pyxdg>=0.26,<0.29",      # https://freedesktop.org/wiki/Software/pyxdg/
     "Jinja2>=2.10,<2.11",     # http://jinja.pocoo.org/docs/latest/changelog/
     "markdown-it-py==3.0.0",  # https://github.com/executablebooks/markdown-it-py/blob/master/CHANGELOG.md
@@ -68,7 +68,7 @@ devel = [
 ]
 
 [build-system]
-requires = ["setuptools>=80,<81", "babel==2.12.1"]
+requires = ["setuptools>=80,<81", "babel==2.18.0"]
 build-backend = "setuptools.build_meta"
 
 [tool.pytest.ini_options]