diff --git a/poetry.lock b/poetry.lock
index aa8de2a..8440da2 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -151,6 +151,20 @@ dev = ["pytest", "coverage", "tox", "sphinx", "pallets-sphinx-themes", "sphinxco
 docs = ["sphinx", "pallets-sphinx-themes", "sphinxcontrib-log-cabinet", "sphinx-issues"]
 dotenv = ["python-dotenv"]
 
+[[package]]
+name = "gunicorn"
+version = "20.0.4"
+description = "WSGI HTTP Server for UNIX"
+category = "main"
+optional = false
+python-versions = ">=3.4"
+
+[package.extras]
+eventlet = ["eventlet (>=0.9.7)"]
+gevent = ["gevent (>=0.13)"]
+setproctitle = ["setproctitle"]
+tornado = ["tornado (>=0.2)"]
+
 [[package]]
 name = "idna"
 version = "2.10"
@@ -592,7 +606,7 @@ testing = ["pytest (>=4.6)", "pytest-checkdocs (>=1.2.3)", "pytest-flake8", "pyt
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.7.1"
-content-hash = "1c449a28ab1fc3b5783440317f4c188d023ea1bf19b424419df9d4d016c59b85"
+content-hash = "a3145fc9ae0ec37f6d9035b471d34b1cc2aa6cfdac432e42ec2c5bc7c6975b84"
 
 [metadata.files]
 ansi2html = [
@@ -643,6 +657,10 @@ flask = [
     {file = "Flask-1.1.2-py2.py3-none-any.whl", hash = "sha256:8a4fdd8936eba2512e9c85df320a37e694c93945b33ef33c89946a340a238557"},
     {file = "Flask-1.1.2.tar.gz", hash = "sha256:4efa1ae2d7c9865af48986de8aeb8504bf32c7f3d6fdc9353d34b21f4b127060"},
 ]
+gunicorn = [
+    {file = "gunicorn-20.0.4-py2.py3-none-any.whl", hash = "sha256:cd4a810dd51bf497552cf3f863b575dabd73d6ad6a91075b65936b151cbf4f9c"},
+    {file = "gunicorn-20.0.4.tar.gz", hash = "sha256:1904bb2b8a43658807108d59c3f3d56c2b6121a701161de0ddf9ad140073c626"},
+]
 idna = [
     {file = "idna-2.10-py2.py3-none-any.whl", hash = "sha256:b97d804b1e9b523befed77c48dacec60e6dcb0b5391d57af6a65a312a90648c0"},
     {file = "idna-2.10.tar.gz", hash = "sha256:b307872f855b18632ce0c21c5e45be78c0ea7ae4c15c828c20788b26921eb3f6"},