diff --git a/poetry.lock b/poetry.lock
index 8dcfa73c..ef92d3b7 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -225,11 +225,11 @@ version = "0.1.0"
 Flask = "^1.1.1"
 apispec = "^3.2.0"
 flask-cors = "^3.0.8"
-marshmallow = "^3.3.0"
+marshmallow = "^3.4.0"
 webargs = "^5.5.3"
 
 [package.source]
-reference = "d9156c37a01c451f37d9949c7da72921d3b16ad2"
+reference = "2a8213651083ad9387bf3f7f27e9b8ec64c6e2bc"
 type = "git"
 url = "https://github.com/labthings/python-labthings.git"
 [[package]]
@@ -447,7 +447,7 @@ description = "Python documentation generator"
 name = "sphinx"
 optional = false
 python-versions = ">=3.5"
-version = "2.3.1"
+version = "2.4.1"
 
 [package.dependencies]
 Jinja2 = ">=2.3"
@@ -470,7 +470,7 @@ sphinxcontrib-serializinghtml = "*"
 
 [package.extras]
 docs = ["sphinxcontrib-websupport"]
-test = ["pytest", "pytest-cov", "html5lib", "flake8 (>=3.5.0)", "flake8-import-order", "mypy (>=0.761)", "docutils-stubs"]
+test = ["pytest (<5.3.3)", "pytest-cov", "html5lib", "flake8 (>=3.5.0)", "flake8-import-order", "mypy (>=0.761)", "docutils-stubs"]
 
 [[package]]
 category = "dev"
@@ -755,6 +755,11 @@ markupsafe = [
     {file = "MarkupSafe-1.1.1-cp37-cp37m-manylinux1_x86_64.whl", hash = "sha256:ba59edeaa2fc6114428f1637ffff42da1e311e29382d81b339c1817d37ec93c6"},
     {file = "MarkupSafe-1.1.1-cp37-cp37m-win32.whl", hash = "sha256:b00c1de48212e4cc9603895652c5c410df699856a2853135b3967591e4beebc2"},
     {file = "MarkupSafe-1.1.1-cp37-cp37m-win_amd64.whl", hash = "sha256:9bf40443012702a1d2070043cb6291650a0841ece432556f784f004937f0f32c"},
+    {file = "MarkupSafe-1.1.1-cp38-cp38-macosx_10_9_x86_64.whl", hash = "sha256:6788b695d50a51edb699cb55e35487e430fa21f1ed838122d722e0ff0ac5ba15"},
+    {file = "MarkupSafe-1.1.1-cp38-cp38-manylinux1_i686.whl", hash = "sha256:cdb132fc825c38e1aeec2c8aa9338310d29d337bebbd7baa06889d09a60a1fa2"},
+    {file = "MarkupSafe-1.1.1-cp38-cp38-manylinux1_x86_64.whl", hash = "sha256:13d3144e1e340870b25e7b10b98d779608c02016d5184cfb9927a9f10c689f42"},
+    {file = "MarkupSafe-1.1.1-cp38-cp38-win32.whl", hash = "sha256:596510de112c685489095da617b5bcbbac7dd6384aeebeda4df6025d0256a81b"},
+    {file = "MarkupSafe-1.1.1-cp38-cp38-win_amd64.whl", hash = "sha256:e8313f01ba26fbbe36c7be1966a7b7424942f670f38e666995b88d012765b9be"},
     {file = "MarkupSafe-1.1.1.tar.gz", hash = "sha256:29872e92839765e546828bb7754a68c418d927cd064fd4708fab9fe9c8bb116b"},
 ]
 marshmallow = [
@@ -939,8 +944,8 @@ snowballstemmer = [
     {file = "snowballstemmer-2.0.0.tar.gz", hash = "sha256:df3bac3df4c2c01363f3dd2cfa78cce2840a79b9f1c2d2de9ce8d31683992f52"},
 ]
 sphinx = [
-    {file = "Sphinx-2.3.1-py3-none-any.whl", hash = "sha256:298537cb3234578b2d954ff18c5608468229e116a9757af3b831c2b2b4819159"},
-    {file = "Sphinx-2.3.1.tar.gz", hash = "sha256:e6e766b74f85f37a5f3e0773a1e1be8db3fcb799deb58ca6d18b70b0b44542a5"},
+    {file = "Sphinx-2.4.1-py3-none-any.whl", hash = "sha256:5024a67f065fe60d9db2005580074d81f22a02dd8f00a5b1ec3d5f4d42bc88d8"},
+    {file = "Sphinx-2.4.1.tar.gz", hash = "sha256:f929b72e0cfe45fa581b8964d54457117863a6a6c9369ecc1a65b8827abd3bf2"},
 ]
 sphinxcontrib-applehelp = [
     {file = "sphinxcontrib-applehelp-1.0.1.tar.gz", hash = "sha256:edaa0ab2b2bc74403149cb0209d6775c96de797dfd5b5e2a71981309efab3897"},