diff --git a/poetry.lock b/poetry.lock
index 5be0bcfc..19c1ef24 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -279,7 +279,7 @@ description = "Python implementation of LabThings, based on the Flask microframe
 name = "labthings"
 optional = false
 python-versions = ">=3.6,<4.0"
-version = "0.5.2"
+version = "0.5.3"
 
 [package.dependencies]
 Flask = ">=1.1.1,<2.0.0"
@@ -313,12 +313,12 @@ description = "A lightweight library for converting complex datatypes to and fro
 name = "marshmallow"
 optional = false
 python-versions = ">=3.5"
-version = "3.5.1"
+version = "3.5.2"
 
 [package.extras]
-dev = ["pytest", "pytz", "simplejson", "mypy (0.761)", "flake8 (3.7.9)", "flake8-bugbear (20.1.4)", "pre-commit (>=1.20,<3.0)", "tox"]
-docs = ["sphinx (2.4.3)", "sphinx-issues (1.2.0)", "alabaster (0.7.12)", "sphinx-version-warning (1.1.2)"]
-lint = ["mypy (0.761)", "flake8 (3.7.9)", "flake8-bugbear (20.1.4)", "pre-commit (>=1.20,<3.0)"]
+dev = ["pytest", "pytz", "simplejson", "mypy (0.770)", "flake8 (3.7.9)", "flake8-bugbear (20.1.4)", "pre-commit (>=1.20,<3.0)", "tox"]
+docs = ["sphinx (3.0.3)", "sphinx-issues (1.2.0)", "alabaster (0.7.12)", "sphinx-version-warning (1.1.2)"]
+lint = ["mypy (0.770)", "flake8 (3.7.9)", "flake8-bugbear (20.1.4)", "pre-commit (>=1.20,<3.0)"]
 tests = ["pytest", "pytz", "simplejson"]
 
 [[package]]
@@ -735,7 +735,7 @@ ifaddr = "*"
 rpi = ["picamera", "RPi.GPIO"]
 
 [metadata]
-content-hash = "f880f4ec9bc5aacc0b508e234779c32fe418f96db56eb4bc805ab22cba695d7e"
+content-hash = "78984c9fc264ae453f51e49d12d3d70e663b7d2a0d3a1829529339904d0c5c00"
 python-versions = "^3.6"
 
 [metadata.files]
@@ -903,8 +903,8 @@ jinja2 = [
     {file = "Jinja2-2.11.2.tar.gz", hash = "sha256:89aab215427ef59c34ad58735269eb58b1a5808103067f7bb9d5836c651b3bb0"},
 ]
 labthings = [
-    {file = "labthings-0.5.2-py3-none-any.whl", hash = "sha256:d7bc6a7566e8b53bbe44f9979cdaa82240b67e76d6414beabc2ccce5b8680c96"},
-    {file = "labthings-0.5.2.tar.gz", hash = "sha256:5816c9e924142e0a8b7ca1ed752a9efcd2724afe6da616e06d220ffc05c949e8"},
+    {file = "labthings-0.5.3-py3-none-any.whl", hash = "sha256:86ab087945fd1f824b1c1d6f8e05a7d149df5da5be650746a8432837ccc644b9"},
+    {file = "labthings-0.5.3.tar.gz", hash = "sha256:dc521e49d69031ef2754fa31c4f246b9b5c6aaed00f5d622c0a877970a8b9721"},
 ]
 lazy-object-proxy = [
     {file = "lazy-object-proxy-1.4.3.tar.gz", hash = "sha256:f3900e8a5de27447acbf900b4750b0ddfd7ec1ea7fbaf11dfa911141bc522af0"},
@@ -965,8 +965,8 @@ markupsafe = [
     {file = "MarkupSafe-1.1.1.tar.gz", hash = "sha256:29872e92839765e546828bb7754a68c418d927cd064fd4708fab9fe9c8bb116b"},
 ]
 marshmallow = [
-    {file = "marshmallow-3.5.1-py2.py3-none-any.whl", hash = "sha256:ac2e13b30165501b7d41fc0371b8df35944f5849769d136f20e2c5f6cdc6e665"},
-    {file = "marshmallow-3.5.1.tar.gz", hash = "sha256:90854221bbb1498d003a0c3cc9d8390259137551917961c8b5258c64026b2f85"},
+    {file = "marshmallow-3.5.2-py2.py3-none-any.whl", hash = "sha256:f12203bf8d94c410ab4b8d66edfde4f8a364892bde1f6747179765559f93d62a"},
+    {file = "marshmallow-3.5.2.tar.gz", hash = "sha256:56663fa1d5385c14c6a1236badd166d6dee987a5f64d2b6cc099dadf96eb4f09"},
 ]
 mccabe = [
     {file = "mccabe-0.6.1-py2.py3-none-any.whl", hash = "sha256:ab8a6258860da4b6677da4bd2fe5dc2c659cff31b3ee4f7f5d64e79735b80d42"},
diff --git a/pyproject.toml b/pyproject.toml
index 52e45351..1ff1aef4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -39,7 +39,7 @@ opencv-python-headless = [
     {version = "4.1.0.25", python = "~3.7"},  # PiWheels build for RPi running Py37
     {version = "4.2.0.34", python = "^3.8"}  # Latest for Py38 systems
 ]
-labthings = "0.5.2"
+labthings = "0.5.3"
 
 [tool.poetry.extras]
 rpi = ["picamera", "RPi.GPIO"]