diff --git a/poetry.lock b/poetry.lock
index fa55082..eb53e7c 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -550,17 +550,17 @@ python-versions = "*"
 
 [[package]]
 name = "sphinx"
-version = "3.5.4"
+version = "4.1.0"
 description = "Python documentation generator"
 category = "dev"
 optional = false
-python-versions = ">=3.5"
+python-versions = ">=3.6"
 
 [package.dependencies]
 alabaster = ">=0.7,<0.8"
 babel = ">=1.3"
 colorama = {version = ">=0.3.5", markers = "sys_platform == \"win32\""}
-docutils = ">=0.12,<0.17"
+docutils = ">=0.14,<0.18"
 imagesize = "*"
 Jinja2 = ">=2.3"
 packaging = "*"
@@ -576,7 +576,7 @@ sphinxcontrib-serializinghtml = "*"
 
 [package.extras]
 docs = ["sphinxcontrib-websupport"]
-lint = ["flake8 (>=3.5.0)", "isort", "mypy (>=0.800)", "docutils-stubs"]
+lint = ["flake8 (>=3.5.0)", "isort", "mypy (>=0.900)", "docutils-stubs", "types-typed-ast", "types-pkg-resources", "types-requests"]
 test = ["pytest", "pytest-cov", "html5lib", "cython", "typed-ast"]
 
 [[package]]
@@ -794,7 +794,7 @@ testing = ["pytest (>=4.6)", "pytest-checkdocs (>=1.2.3)", "pytest-flake8", "pyt
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.6"
-content-hash = "126e0b433bee61b89d933d3de277ed0a9e485751c7efac8a953a2985c98e8d65"
+content-hash = "334362c18807c5180dedef19f0dbb7e6de17c5c3ee753d372cc44eaa31cb5460"
 
 [metadata.files]
 alabaster = [
@@ -1180,8 +1180,8 @@ snowballstemmer = [
     {file = "snowballstemmer-2.1.0.tar.gz", hash = "sha256:e997baa4f2e9139951b6f4c631bad912dfd3c792467e2f03d7239464af90e914"},
 ]
 sphinx = [
-    {file = "Sphinx-3.5.4-py3-none-any.whl", hash = "sha256:2320d4e994a191f4b4be27da514e46b3d6b420f2ff895d064f52415d342461e8"},
-    {file = "Sphinx-3.5.4.tar.gz", hash = "sha256:19010b7b9fa0dc7756a6e105b2aacd3a80f798af3c25c273be64d7beeb482cb1"},
+    {file = "Sphinx-4.1.0-py3-none-any.whl", hash = "sha256:51028bb0d3340eb80bcc1a2d614e8308ac78d226e6b796943daf57920abc1aea"},
+    {file = "Sphinx-4.1.0.tar.gz", hash = "sha256:4219f14258ca5612a0c85ed9b7222d54da69724d7e9dd92d1819ad1bf65e1ad2"},
 ]
 sphinx-autoapi = [
     {file = "sphinx-autoapi-1.8.1.tar.gz", hash = "sha256:842c0a8f49c824803f7edee31cb1cabd5001a987553bec7b4681283ec9e47d4a"},
diff --git a/pyproject.toml b/pyproject.toml
index 8d85f43..ce5a8ce 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -28,7 +28,7 @@ black = {version = "^20.8b1",allow-prereleases = true}
 pytest-cov = "^2.11.1"
 jsonschema = "^3.2.0"
 pylint = "^2.9.3"
-sphinx = "^3.5.3"
+sphinx = "^4.1.0"
 sphinx-autoapi = "^1.8.1"
 sphinx-rtd-theme = "^0.5.2"
 mypy = "^0.812"