diff --git a/gateway-api/poetry.lock b/gateway-api/poetry.lock
index 3c5a3418..82dbc1ed 100644
--- a/gateway-api/poetry.lock
+++ b/gateway-api/poetry.lock
@@ -446,14 +446,14 @@ toml = ["tomli ; python_full_version <= \"3.11.0a6\""]
 
 [[package]]
 name = "flask"
-version = "3.1.2"
+version = "3.1.3"
 description = "A simple framework for building complex web applications."
 optional = false
 python-versions = ">=3.9"
 groups = ["main"]
 files = [
-    {file = "flask-3.1.2-py3-none-any.whl", hash = "sha256:ca1d8112ec8a6158cc29ea4858963350011b5c846a414cdb7a954aa9e967d03c"},
-    {file = "flask-3.1.2.tar.gz", hash = "sha256:bf656c15c80190ed628ad08cdfd3aaa35beb087855e2f494910aa3774cc4fd87"},
+    {file = "flask-3.1.3-py3-none-any.whl", hash = "sha256:f4bcbefc124291925f1a26446da31a5178f9483862233b23c0c96a20701f670c"},
+    {file = "flask-3.1.3.tar.gz", hash = "sha256:0ef0e52b8a9cd932855379197dd8f94047b359ca0a78695144304cb45f87c9eb"},
 ]
 
 [package.dependencies]
@@ -2425,4 +2425,4 @@ propcache = ">=0.2.1"
 [metadata]
 lock-version = "2.1"
 python-versions = ">3.13,<4.0.0"
-content-hash = "a452bd22e2386a3ff58b4c7a5ac2cb571de9e3d49a4fbc161ffd3aafa2a7bf44"
+content-hash = "3b8b244b5af6326e45d5b868a874c620617b81a0e52ca514bcbb261dc5a57937"
diff --git a/gateway-api/pyproject.toml b/gateway-api/pyproject.toml
index a841d21e..a16f77ea 100644
--- a/gateway-api/pyproject.toml
+++ b/gateway-api/pyproject.toml
@@ -10,7 +10,7 @@ requires-python = ">3.13,<4.0.0"
 
 [tool.poetry.dependencies]
 clinical-data-common = { git = "https://github.com/NHSDigital/clinical-data-common.git", tag = "v0.1.0" }
-flask = "^3.1.2"
+flask = "^3.1.3"
 types-flask = "^1.1.6"
 requests = "^2.32.5"