diff --git a/poetry.lock b/poetry.lock
index 6048cd45..39fb1698 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -87,6 +87,21 @@ category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
+[[package]]
+name = "beautifulsoup4"
+version = "4.9.3"
+description = "Screen-scraping library"
+category = "dev"
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+soupsieve = {version = ">1.2", markers = "python_version >= \"3.0\""}
+
+[package.extras]
+html5lib = ["html5lib"]
+lxml = ["lxml"]
+
 [[package]]
 name = "black"
 version = "20.8b1"
@@ -414,13 +429,14 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [[package]]
 name = "pydata-sphinx-theme"
-version = "0.4.3"
+version = "0.5.1"
 description = "Bootstrap-based Sphinx theme from the PyData community"
 category = "dev"
 optional = false
 python-versions = ">=3.5"
 
 [package.dependencies]
+beautifulsoup4 = "*"
 sphinx = "*"
 
 [[package]]
@@ -592,6 +608,14 @@ category = "dev"
 optional = false
 python-versions = "*"
 
+[[package]]
+name = "soupsieve"
+version = "2.2.1"
+description = "A modern CSS selector implementation for Beautiful Soup."
+category = "dev"
+optional = false
+python-versions = ">=3.6"
+
 [[package]]
 name = "sphinx"
 version = "3.5.2"
@@ -812,6 +836,11 @@ backoff = [
     {file = "backoff-1.10.0-py2.py3-none-any.whl", hash = "sha256:5e73e2cbe780e1915a204799dba0a01896f45f4385e636bcca7a0614d879d0cd"},
     {file = "backoff-1.10.0.tar.gz", hash = "sha256:b8fba021fac74055ac05eb7c7bfce4723aedde6cd0a504e5326bcb0bdd6d19a4"},
 ]
+beautifulsoup4 = [
+    {file = "beautifulsoup4-4.9.3-py2-none-any.whl", hash = "sha256:4c98143716ef1cb40bf7f39a8e3eec8f8b009509e74904ba3a7b315431577e35"},
+    {file = "beautifulsoup4-4.9.3-py3-none-any.whl", hash = "sha256:fff47e031e34ec82bf17e00da8f592fe7de69aeea38be00523c04623c04fb666"},
+    {file = "beautifulsoup4-4.9.3.tar.gz", hash = "sha256:84729e322ad1d5b4d25f805bfa05b902dd96450f43842c4e99067d5e1369eb25"},
+]
 black = [
     {file = "black-20.8b1.tar.gz", hash = "sha256:1c02557aa099101b9d21496f8a914e9ed2222ef70336404eeeac8edba836fbea"},
 ]
@@ -1074,8 +1103,8 @@ pycodestyle = [
     {file = "pycodestyle-2.6.0.tar.gz", hash = "sha256:c58a7d2815e0e8d7972bf1803331fb0152f867bd89adf8a01dfd55085434192e"},
 ]
 pydata-sphinx-theme = [
-    {file = "pydata-sphinx-theme-0.4.3.tar.gz", hash = "sha256:8cf8fbc74c6c47d6ed497a91f3bedf94d57383b52eebb4fa05ae7fc4f50767a2"},
-    {file = "pydata_sphinx_theme-0.4.3-py3-none-any.whl", hash = "sha256:aa0ae055de5de36a637387941d0e18d8dad35d97d56f0faf25f5219658d49df2"},
+    {file = "pydata-sphinx-theme-0.5.1.tar.gz", hash = "sha256:367ecfb4478e7e6f45ae776a1bca8c2c436fd3d942933a6ef7f2b7e9286a9aaf"},
+    {file = "pydata_sphinx_theme-0.5.1-py3-none-any.whl", hash = "sha256:38d579ae14cd0ac8c8a61e82afc405ea9cbc69cefc55db66114145e815fa016b"},
 ]
 pyflakes = [
     {file = "pyflakes-2.2.0-py2.py3-none-any.whl", hash = "sha256:0d94e0e05a19e57a99444b6ddcf9a6eb2e5c68d3ca1e98e90707af8152c90a92"},
@@ -1172,6 +1201,10 @@ snowballstemmer = [
     {file = "snowballstemmer-2.1.0-py2.py3-none-any.whl", hash = "sha256:b51b447bea85f9968c13b650126a888aabd4cb4463fca868ec596826325dedc2"},
     {file = "snowballstemmer-2.1.0.tar.gz", hash = "sha256:e997baa4f2e9139951b6f4c631bad912dfd3c792467e2f03d7239464af90e914"},
 ]
+soupsieve = [
+    {file = "soupsieve-2.2.1-py3-none-any.whl", hash = "sha256:c2c1c2d44f158cdbddab7824a9af8c4f83c76b1e23e049479aa432feb6c4c23b"},
+    {file = "soupsieve-2.2.1.tar.gz", hash = "sha256:052774848f448cf19c7e959adf5566904d525f33a3f8b6ba6f6f8f26ec7de0cc"},
+]
 sphinx = [
     {file = "Sphinx-3.5.2-py3-none-any.whl", hash = "sha256:ef64a814576f46ec7de06adf11b433a0d6049be007fefe7fd0d183d28b581fac"},
     {file = "Sphinx-3.5.2.tar.gz", hash = "sha256:672cfcc24b6b69235c97c750cb190a44ecd72696b4452acaf75c2d9cc78ca5ff"},