diff --git a/poetry.lock b/poetry.lock
index 04e3ff36..6e6bfdcb 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1114,7 +1114,7 @@ python-versions = ">=3.5"
 
 [[package]]
 name = "sphinx"
-version = "3.4.3"
+version = "3.5.1"
 description = "Python documentation generator"
 category = "dev"
 optional = false
@@ -1140,7 +1140,7 @@ sphinxcontrib-serializinghtml = "*"
 
 [package.extras]
 docs = ["sphinxcontrib-websupport"]
-lint = ["flake8 (>=3.5.0)", "isort", "mypy (>=0.790)", "docutils-stubs"]
+lint = ["flake8 (>=3.5.0)", "isort", "mypy (>=0.800)", "docutils-stubs"]
 test = ["pytest", "pytest-cov", "html5lib", "cython", "typed-ast"]
 
 [[package]]
@@ -1368,7 +1368,7 @@ testing = ["pytest (>=3.5,!=3.7.3)", "pytest-checkdocs (>=1.2.3)", "pytest-flake
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.6.1"
-content-hash = "f621a984aef56e97b8d48982a2950c4775612331b1a93e81c912e5c89f636018"
+content-hash = "b200bbfdb0940c546b54487bdaebad6099aaa8e3da31bd34589a2cd073257635"
 
 [metadata.files]
 alabaster = [
@@ -1461,6 +1461,7 @@ cffi = [
     {file = "cffi-1.14.4-cp39-cp39-macosx_10_9_x86_64.whl", hash = "sha256:840793c68105fe031f34d6a086eaea153a0cd5c491cde82a74b420edd0a2b909"},
     {file = "cffi-1.14.4-cp39-cp39-manylinux1_i686.whl", hash = "sha256:b18e0a9ef57d2b41f5c68beefa32317d286c3d6ac0484efd10d6e07491bb95dd"},
     {file = "cffi-1.14.4-cp39-cp39-manylinux1_x86_64.whl", hash = "sha256:045d792900a75e8b1e1b0ab6787dd733a8190ffcf80e8c8ceb2fb10a29ff238a"},
+    {file = "cffi-1.14.4-cp39-cp39-manylinux2014_aarch64.whl", hash = "sha256:7ef7d4ced6b325e92eb4d3502946c78c5367bc416398d387b39591532536734e"},
     {file = "cffi-1.14.4-cp39-cp39-win32.whl", hash = "sha256:ba4e9e0ae13fc41c6b23299545e5ef73055213e466bd107953e4a013a5ddd7e3"},
     {file = "cffi-1.14.4-cp39-cp39-win_amd64.whl", hash = "sha256:f032b34669220030f905152045dfa27741ce1a6db3324a5bc0b96b6c7420c87b"},
     {file = "cffi-1.14.4.tar.gz", hash = "sha256:1a465cbe98a7fd391d47dce4b8f7e5b921e6cd805ef421d04f5f66ba8f06086c"},
@@ -2010,8 +2011,8 @@ soupsieve = [
     {file = "soupsieve-2.0.1.tar.gz", hash = "sha256:a59dc181727e95d25f781f0eb4fd1825ff45590ec8ff49eadfd7f1a537cc0232"},
 ]
 sphinx = [
-    {file = "Sphinx-3.4.3-py3-none-any.whl", hash = "sha256:c314c857e7cd47c856d2c5adff514ac2e6495f8b8e0f886a8a37e9305dfea0d8"},
-    {file = "Sphinx-3.4.3.tar.gz", hash = "sha256:41cad293f954f7d37f803d97eb184158cfd90f51195131e94875bc07cd08b93c"},
+    {file = "Sphinx-3.5.1-py3-none-any.whl", hash = "sha256:e90161222e4d80ce5fc811ace7c6787a226b4f5951545f7f42acf97277bfc35c"},
+    {file = "Sphinx-3.5.1.tar.gz", hash = "sha256:11d521e787d9372c289472513d807277caafb1684b33eb4f08f7574c405893a9"},
 ]
 sphinx-autobuild = [
     {file = "sphinx-autobuild-2020.9.1.tar.gz", hash = "sha256:4b184a7db893f2100bbd831991ae54ca89167a2b9ce68faea71eaa9e37716aed"},
diff --git a/pyproject.toml b/pyproject.toml
index 2275c1b0..afe0d973 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,7 +31,7 @@ safety = "^1.10.3"
 mypy = "^0.800"
 typeguard = "^2.10.0"
 xdoctest = {extras = ["colors"], version = "^0.15.4"}
-sphinx = "^3.4.3"
+sphinx = "^3.5.1"
 sphinx-autobuild = "^2020.9.1"
 pre-commit = "^2.10.0"
 flake8 = "^3.8.4"