diff --git a/poetry.lock b/poetry.lock
index a0574684853d3f8df59656ffbc829d7818e28da5..7bb540e239abc8f312d4cccfc780685f66d7045b 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -778,7 +778,7 @@ python-versions = "*"
 
 [[package]]
 name = "sphinx"
-version = "3.4.3"
+version = "3.5.0"
 description = "Python documentation generator"
 category = "dev"
 optional = false
@@ -803,9 +803,9 @@ sphinxcontrib-qthelp = "*"
 sphinxcontrib-serializinghtml = "*"
 
 [package.extras]
-docs = ["sphinxcontrib-websupport"]
-lint = ["flake8 (>=3.5.0)", "isort", "mypy (>=0.790)", "docutils-stubs"]
+lint = ["docutils-stubs", "flake8 (>=3.5.0)", "isort", "mypy (>=0.800)"]
 test = ["pytest", "pytest-cov", "html5lib", "cython", "typed-ast"]
+docs = ["sphinxcontrib-websupport"]
 
 [[package]]
 name = "sphinx-autodoc-typehints"
@@ -1029,7 +1029,7 @@ testing = ["pytest (>=3.5,!=3.7.3)", "pytest-checkdocs (>=1.2.3)", "pytest-flake
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.6"
-content-hash = "5d65d5b0373764730ada0fa0b18f685c9105addf53e418b74c06ce5977cbb6e3"
+content-hash = "679902e509b4fbb6ab7b3c26a3a32703cd8912c4f0d3c2b048a4920594fed60e"
 
 [metadata.files]
 alabaster = [
@@ -1512,8 +1512,8 @@ snowballstemmer = [
     {file = "snowballstemmer-2.1.0.tar.gz", hash = "sha256:e997baa4f2e9139951b6f4c631bad912dfd3c792467e2f03d7239464af90e914"},
 ]
 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-3.5.0-py3-none-any.whl", hash = "sha256:68da66ca3d6b35b22bea5c53d938d5f8988663dca042f0a46429a1eba1010051"},
+    {file = "Sphinx-3.5.0.tar.gz", hash = "sha256:deb468efb3abaa70d790add4147d18782d86fdeacf648d6e8afb7a99807f1546"},
 ]
 sphinx-autodoc-typehints = [
     {file = "sphinx-autodoc-typehints-1.11.1.tar.gz", hash = "sha256:244ba6d3e2fdb854622f643c7763d6f95b6886eba24bec28e86edf205e4ddb20"},
diff --git a/pyproject.toml b/pyproject.toml
index 466ffdfb5a06221344db92d010c6e7f2c2079a5a..fc26005a44a5abfefa563eb9c62a5bb4ad012581 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -12,7 +12,7 @@ python-barcode = "^0.13.1"
 requests = "^2.25.1"
 
 [tool.poetry.dev-dependencies]
-sphinx = "^3.0"
+sphinx = "^3.5"
 sphinx-autodoc-typehints = "^1.7"
 pytest = "^6.0"
 safety = "^1.8.5"