diff --git a/poetry.lock b/poetry.lock
index a59e8f0..2529e55 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1052,7 +1052,7 @@ python-versions = "*"
 
 [[package]]
 name = "sphinx"
-version = "3.5.3"
+version = "3.5.4"
 description = "Python documentation generator"
 category = "dev"
 optional = false
@@ -1062,7 +1062,7 @@ python-versions = ">=3.5"
 alabaster = ">=0.7,<0.8"
 babel = ">=1.3"
 colorama = {version = ">=0.3.5", markers = "sys_platform == \"win32\""}
-docutils = ">=0.12"
+docutils = ">=0.12,<0.17"
 imagesize = "*"
 Jinja2 = ">=2.3"
 packaging = "*"
@@ -1881,8 +1881,8 @@ sortedcontainers = [
     {file = "sortedcontainers-2.1.0.tar.gz", hash = "sha256:974e9a32f56b17c1bac2aebd9dcf197f3eb9cd30553c5852a3187ad162e1a03a"},
 ]
 sphinx = [
-    {file = "Sphinx-3.5.3-py3-none-any.whl", hash = "sha256:3f01732296465648da43dec8fb40dc451ba79eb3e2cc5c6d79005fd98197107d"},
-    {file = "Sphinx-3.5.3.tar.gz", hash = "sha256:ce9c228456131bab09a3d7d10ae58474de562a6f79abb3dc811ae401cf8c1abc"},
+    {file = "Sphinx-3.5.4-py3-none-any.whl", hash = "sha256:2320d4e994a191f4b4be27da514e46b3d6b420f2ff895d064f52415d342461e8"},
+    {file = "Sphinx-3.5.4.tar.gz", hash = "sha256:19010b7b9fa0dc7756a6e105b2aacd3a80f798af3c25c273be64d7beeb482cb1"},
 ]
 sphinx-autodoc-typehints = [
     {file = "sphinx-autodoc-typehints-1.11.1.tar.gz", hash = "sha256:244ba6d3e2fdb854622f643c7763d6f95b6886eba24bec28e86edf205e4ddb20"},