diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index e4eb0d8f3..61c6e0e99 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -22,7 +22,7 @@ stages:
 
     - script: |
         python -m pip install --upgrade pip poetry
-        poetry install --extras docs
+        poetry install --extras dev
       displayName: 'Install dependencies'
 
     - script: |
diff --git a/poetry.lock b/poetry.lock
index b610c409b..82bbfa385 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -204,7 +204,7 @@ untokenize = "*"
 
 [[package]]
 name = "docutils"
-version = "0.16"
+version = "0.17.1"
 description = "Docutils -- Python Documentation Utilities"
 category = "main"
 optional = false
@@ -572,7 +572,7 @@ python-versions = "*"
 
 [[package]]
 name = "sphinx"
-version = "3.5.4"
+version = "3.5.3"
 description = "Python documentation generator"
 category = "main"
 optional = true
@@ -582,7 +582,7 @@ python-versions = ">=3.5"
 alabaster = ">=0.7,<0.8"
 babel = ">=1.3"
 colorama = {version = ">=0.3.5", markers = "sys_platform == \"win32\""}
-docutils = ">=0.12,<0.17"
+docutils = ">=0.12"
 imagesize = "*"
 Jinja2 = ">=2.3"
 packaging = "*"
@@ -616,14 +616,13 @@ sphinx = ">=1.5,<4.0"
 
 [[package]]
 name = "sphinx-rtd-theme"
-version = "0.5.2"
+version = "0.5.1"
 description = "Read the Docs theme for Sphinx"
 category = "main"
 optional = true
 python-versions = "*"
 
 [package.dependencies]
-docutils = "<0.17"
 sphinx = "*"
 
 [package.extras]
@@ -849,12 +848,12 @@ docs = ["sphinx", "jaraco.packaging (>=8.2)", "rst.linker (>=1.9)"]
 testing = ["pytest (>=4.6)", "pytest-checkdocs (>=1.2.3)", "pytest-flake8", "pytest-cov", "pytest-enabler", "jaraco.itertools", "func-timeout", "pytest-black (>=0.3.7)", "pytest-mypy"]
 
 [extras]
-docs = ["sphinx", "sphinx_click", "sphinxcontrib-apidoc", "sphinx_rtd_theme"]
+dev = ["sphinx", "sphinx_click", "sphinxcontrib-apidoc", "sphinx_rtd_theme", "heatshrink2"]
 
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.6.5"
-content-hash = "5775abe6f8e0f1050d70cdd7de37e225e987f01b9dcb767fda3e7a52e5e107fb"
+content-hash = "3ca00f191fb8ad92a83c860987be834e33aab521d5362f7c57737415c6ac41d2"
 
 [metadata.files]
 alabaster = [
@@ -1030,8 +1029,8 @@ docformatter = [
     {file = "docformatter-1.4.tar.gz", hash = "sha256:064e6d81f04ac96bc0d176cbaae953a0332482b22d3ad70d47c8a7f2732eef6f"},
 ]
 docutils = [
-    {file = "docutils-0.16-py2.py3-none-any.whl", hash = "sha256:0c5b78adfbf7762415433f5515cd5c9e762339e23369dbe8000d84a4bf4ab3af"},
-    {file = "docutils-0.16.tar.gz", hash = "sha256:c2de3a60e9e7d07be26b7f2b00ca0309c207e06c100f9cc2a94931fc75a478fc"},
+    {file = "docutils-0.17.1-py2.py3-none-any.whl", hash = "sha256:cf316c8370a737a022b72b56874f6602acf974a37a9fba42ec2876387549fc61"},
+    {file = "docutils-0.17.1.tar.gz", hash = "sha256:686577d2e4c32380bb50cbb22f575ed742d58168cee37e99117a854bcd88f125"},
 ]
 filelock = [
     {file = "filelock-3.0.12-py3-none-any.whl", hash = "sha256:929b7d63ec5b7d6b71b0fa5ac14e030b3f70b75747cef1b10da9b879fef15836"},
@@ -1267,16 +1266,16 @@ snowballstemmer = [
     {file = "snowballstemmer-2.1.0.tar.gz", hash = "sha256:e997baa4f2e9139951b6f4c631bad912dfd3c792467e2f03d7239464af90e914"},
 ]
 sphinx = [
-    {file = "Sphinx-3.5.4-py3-none-any.whl", hash = "sha256:2320d4e994a191f4b4be27da514e46b3d6b420f2ff895d064f52415d342461e8"},
-    {file = "Sphinx-3.5.4.tar.gz", hash = "sha256:19010b7b9fa0dc7756a6e105b2aacd3a80f798af3c25c273be64d7beeb482cb1"},
+    {file = "Sphinx-3.5.3-py3-none-any.whl", hash = "sha256:3f01732296465648da43dec8fb40dc451ba79eb3e2cc5c6d79005fd98197107d"},
+    {file = "Sphinx-3.5.3.tar.gz", hash = "sha256:ce9c228456131bab09a3d7d10ae58474de562a6f79abb3dc811ae401cf8c1abc"},
 ]
 sphinx-click = [
     {file = "sphinx-click-2.7.1.tar.gz", hash = "sha256:1b6175df5392564fd3780000d4627e5a2c8c3b29d05ad311dbbe38fcf5f3327b"},
     {file = "sphinx_click-2.7.1-py2.py3-none-any.whl", hash = "sha256:e738a2c7a87f23e67da4a9e28ca6f085d3ca626f0e4164847f77ff3c36c65df1"},
 ]
 sphinx-rtd-theme = [
-    {file = "sphinx_rtd_theme-0.5.2-py2.py3-none-any.whl", hash = "sha256:4a05bdbe8b1446d77a01e20a23ebc6777c74f43237035e76be89699308987d6f"},
-    {file = "sphinx_rtd_theme-0.5.2.tar.gz", hash = "sha256:32bd3b5d13dc8186d7a42fc816a23d32e83a4827d7d9882948e7b837c232da5a"},
+    {file = "sphinx_rtd_theme-0.5.1-py2.py3-none-any.whl", hash = "sha256:fa6bebd5ab9a73da8e102509a86f3fcc36dec04a0b52ea80e5a033b2aba00113"},
+    {file = "sphinx_rtd_theme-0.5.1.tar.gz", hash = "sha256:eda689eda0c7301a80cf122dad28b1861e5605cbf455558f3775e1e8200e83a5"},
 ]
 sphinxcontrib-apidoc = [
     {file = "sphinxcontrib-apidoc-0.3.0.tar.gz", hash = "sha256:729bf592cf7b7dd57c4c05794f732dc026127275d785c2a5494521fdde773fb9"},
diff --git a/pyproject.toml b/pyproject.toml
index 0062b462e..a8b5b07b2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -44,7 +44,12 @@ sphinx_rtd_theme = { version = "^0", optional = true }
 PyYAML = "^5"
 
 [tool.poetry.extras]
-docs = ["sphinx", "sphinx_click", "sphinxcontrib-apidoc", "sphinx_rtd_theme"]
+dev = ["sphinx",
+  "sphinx_click",
+  "sphinxcontrib-apidoc",
+  "sphinx_rtd_theme",
+  "heatshrink2"
+]
 
 [tool.poetry.dev-dependencies]
 pytest = "^5"