diff --git a/poetry.lock b/poetry.lock
index 392b55005..165def82c 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1796,14 +1796,14 @@ files = [
 
 [[package]]
 name = "nhs-number"
-version = "1.3.4"
+version = "1.3.6"
 description = "Python package to provide utilities for NHS Numbers, including validity checks, normalisation, and generation."
 optional = false
-python-versions = ">=3.7,<4.0"
+python-versions = "<4.0,>=3.8"
 groups = ["main"]
 files = [
-    {file = "nhs_number-1.3.4-py3-none-any.whl", hash = "sha256:254b31ffe85ae2290c9325442fb4427c3839f46a049408bb1c1e9c9f36e0c39b"},
-    {file = "nhs_number-1.3.4.tar.gz", hash = "sha256:be2bb644aead15a3d7b577d48717d599b85469a101f105efd6effbad1bf70217"},
+    {file = "nhs_number-1.3.6-py3-none-any.whl", hash = "sha256:22b8937b148f0d930acc69aaff00af1d6fb0e73f4c03fced3df4ad017479dc19"},
+    {file = "nhs_number-1.3.6.tar.gz", hash = "sha256:5effca980ce7bb6734f07a7843816ae952166767511c3edf179b8fdcde8713e5"},
 ]
 
 [[package]]
@@ -2749,4 +2749,4 @@ files = [
 [metadata]
 lock-version = "2.1"
 python-versions = "^3.12"
-content-hash = "e29c5454e4d33ab0a8dd4e5b05ee436c78664d59d353474fa8707502ff68468d"
+content-hash = "bd9afc04e4bae11d9f8bc1032e95061c20557cc0fce37a2c980cc375b56b2e56"
diff --git a/pyproject.toml b/pyproject.toml
index ca90d36d1..e770f50ea 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,7 @@ package-mode = false
 
 [tool.poetry.dependencies]
 python = "^3.12"
-nhs-number = "1.3.4"
+nhs-number = "1.3.6"
 aws-lambda-powertools = "^2.35.1"
 requests = "^2.32.4"
 boto3-stubs = {extras = ["dynamodb", "firehose", "kinesis", "lambda", "rds", "s3"], version = "^1.34.65"}