diff --git a/poetry.lock b/poetry.lock
index 454e9c8c..5a045084 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -2142,6 +2142,21 @@ pycrypto = ["pycrypto (>=2.6.0,<2.7.0)"]
 pycryptodome = ["pycryptodome (>=3.3.1,<4.0.0)"]
 test = ["pytest", "pytest-cov"]
 
+[[package]]
+name = "python-json-logger"
+version = "3.3.0"
+description = "JSON Log Formatter for the Python Logging Package"
+optional = false
+python-versions = ">=3.8"
+groups = ["main"]
+files = [
+    {file = "python_json_logger-3.3.0-py3-none-any.whl", hash = "sha256:dd980fae8cffb24c13caf6e158d3d61c0d6d22342f932cb6e9deedab3d35eec7"},
+    {file = "python_json_logger-3.3.0.tar.gz", hash = "sha256:12b7e74b17775e7d565129296105bbe3910842d9d0eb083fc83a6a617aa8df84"},
+]
+
+[package.extras]
+dev = ["backports.zoneinfo ; python_version < \"3.9\"", "black", "build", "freezegun", "mdx_truly_sane_lists", "mike", "mkdocs", "mkdocs-awesome-pages-plugin", "mkdocs-gen-files", "mkdocs-literate-nav", "mkdocs-material (>=8.5)", "mkdocstrings[python]", "msgspec ; implementation_name != \"pypy\"", "mypy", "orjson ; implementation_name != \"pypy\"", "pylint", "pytest", "tzdata", "validate-pyproject[all]"]
+
 [[package]]
 name = "pyyaml"
 version = "6.0.2"
@@ -2718,4 +2733,4 @@ propcache = ">=0.2.0"
 [metadata]
 lock-version = "2.1"
 python-versions = "^3.13"
-content-hash = "77f89af354ea0782651c8ec880f986a548967aee33149c8f128398e08b783567"
+content-hash = "66d3b08c30efad3bc44af346e21ccb3b79ceed688d3337ece9e839ec8003903a"
diff --git a/pyproject.toml b/pyproject.toml
index def4f287..75ecdf94 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,6 +31,7 @@ botocore = "^1.37.3"
 eval-type-backport = "^0.2.2"
 mangum = "^0.19.0"
 wireup = "^0.16.0"
+python-json-logger = "^3.3.0"
 
 [tool.poetry.group.dev.dependencies]
 ruff = "^0.11.0"
diff --git a/src/eligibility_signposting_api/config.py b/src/eligibility_signposting_api/config.py
index 1b4aa414..27618328 100644
--- a/src/eligibility_signposting_api/config.py
+++ b/src/eligibility_signposting_api/config.py
@@ -2,6 +2,7 @@
 import os
 from typing import Any, NewType
 
+from pythonjsonlogger.json import JsonFormatter
 from yarl import URL
 
 LOG_LEVEL = logging.getLevelNamesMapping().get(os.getenv("LOG_LEVEL", ""), logging.WARNING)
@@ -22,4 +23,7 @@ def config() -> dict[str, Any]:
 
 def init_logging() -> None:
     log_format = "%(asctime)s %(levelname)-8s %(name)s %(module)s.py:%(funcName)s():%(lineno)d %(message)s"
-    logging.basicConfig(level=LOG_LEVEL, format=log_format, handlers=[logging.StreamHandler()])
+    formatter = JsonFormatter(log_format)
+    handler = logging.StreamHandler()
+    handler.setFormatter(formatter)
+    logging.basicConfig(level=LOG_LEVEL, format=log_format, handlers=[handler])