diff --git a/poetry.lock b/poetry.lock
index 6e67de00..08085e91 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1154,7 +1154,7 @@ python-versions = ">=3.6"
 
 [[package]]
 name = "sphinx"
-version = "4.3.0"
+version = "4.3.1"
 description = "Python documentation generator"
 category = "dev"
 optional = false
@@ -1426,7 +1426,7 @@ testing = ["pytest (>=4.6)", "pytest-checkdocs (>=2.4)", "pytest-flake8", "pytes
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.7"
-content-hash = "aa0b9434a4b2c1de3c48ebcd28ccf78bf56297f4661dd912df375a448295dec0"
+content-hash = "e27aa4aa3a4914cd5ce52e4f691737651bbb624c3b277a074a3541648e82b425"
 
 [metadata.files]
 alabaster = [
@@ -2177,8 +2177,8 @@ soupsieve = [
     {file = "soupsieve-2.3.1.tar.gz", hash = "sha256:b8d49b1cd4f037c7082a9683dfa1801aa2597fb11c3a1155b7a5b94829b4f1f9"},
 ]
 sphinx = [
-    {file = "Sphinx-4.3.0-py3-none-any.whl", hash = "sha256:7e2b30da5f39170efcd95c6270f07669d623c276521fee27ad6c380f49d2bf5b"},
-    {file = "Sphinx-4.3.0.tar.gz", hash = "sha256:6d051ab6e0d06cba786c4656b0fe67ba259fe058410f49e95bee6e49c4052cbf"},
+    {file = "Sphinx-4.3.1-py3-none-any.whl", hash = "sha256:048dac56039a5713f47a554589dc98a442b39226a2b9ed7f82797fcb2fe9253f"},
+    {file = "Sphinx-4.3.1.tar.gz", hash = "sha256:32a5b3e9a1b176cc25ed048557d4d3d01af635e6b76c5bc7a43b0a34447fbd45"},
 ]
 sphinx-autobuild = [
     {file = "sphinx-autobuild-2021.3.14.tar.gz", hash = "sha256:de1ca3b66e271d2b5b5140c35034c89e47f263f2cd5db302c9217065f7443f05"},
diff --git a/pyproject.toml b/pyproject.toml
index 18000b90..d57129f2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -28,7 +28,7 @@ safety = "^1.10.3"
 mypy = "^0.910"
 typeguard = "^2.13.2"
 xdoctest = {extras = ["colors"], version = "^0.15.10"}
-sphinx = "^4.3.0"
+sphinx = "^4.3.1"
 sphinx-autobuild = "^2021.3.14"
 pre-commit = "^2.15.0"
 flake8 = "^4.0.1"