diff --git a/pyproject.toml b/pyproject.toml
index 8df64ff3..58800fc3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -57,7 +57,7 @@ requires-python = '>=3.10'
 # is installed:
 dependencies = [
     'Jinja2>=3.1.3',                # to generate Typst and Markdown files
-    'phonenumbers==9.0.0',        # to validate phone numbers
+    'phonenumbers==9.0.13',        # to validate phone numbers
     'email-validator==2.2.0',       # to validate email addresses
     'pydantic==2.11.9',             # to validate and parse the input file
     'pycountry==24.6.1',            # for ISO 639-3 validation