diff --git a/poetry.lock b/poetry.lock
index fdaac364f..b5108c604 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -2821,13 +2821,13 @@ ptyprocess = ">=0.5"
 
 [[package]]
 name = "phonenumbers"
-version = "8.13.40"
+version = "8.13.42"
 description = "Python version of Google's common library for parsing, formatting, storing and validating international phone numbers."
 optional = false
 python-versions = "*"
 files = [
-    {file = "phonenumbers-8.13.40-py2.py3-none-any.whl", hash = "sha256:9582752c20a1da5ec4449f7f97542bf8a793c8e2fec0ab57f767177bb8fc0b1d"},
-    {file = "phonenumbers-8.13.40.tar.gz", hash = "sha256:f137c2848b8e83dd064b71881b65680584417efa202177fd330e2f7ff6c68113"},
+    {file = "phonenumbers-8.13.42-py2.py3-none-any.whl", hash = "sha256:18acc22ee03116d27b26e990f53806a1770a3e05f05e1620bc09ad187f889456"},
+    {file = "phonenumbers-8.13.42.tar.gz", hash = "sha256:7137904f2db3b991701e853174ce8e1cb8f540b8bfdf27617540de04c0b7bed5"},
 ]
 
 [[package]]
@@ -4743,4 +4743,4 @@ multidict = ">=4.0"
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.12.2"
-content-hash = "8c2b194b00fa7c91ae6f1c3c62343e2643fc82598ca2c165e62cf9f8e77539d6"
+content-hash = "89b99841ebd4bd735104048c8f8f0a35bfedb700a7a5648ecabe713816e25579"
diff --git a/pyproject.toml b/pyproject.toml
index a1323a4f0..9f9b39ce7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -55,7 +55,7 @@ geojson = "^3.1.0"
 govuk-bank-holidays = "^0.14"
 numpy = "^1.26.4"
 ordered-set = "^4.1.0"
-phonenumbers = "^8.13.40"
+phonenumbers = "^8.13.42"
 python-json-logger = "^2.0.7"
 pytz = "^2024.1"
 regex = "^2024.7.24"