diff --git a/poetry.lock b/poetry.lock
index 166b572c..9e09c11d 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1089,79 +1089,6 @@ monitor = ["psutil (>=5.7.0)"]
 recommended = ["cffi (>=1.12.2)", "dnspython (>=1.16.0,<2.0)", "idna", "psutil (>=5.7.0)"]
 test = ["cffi (>=1.12.2)", "coverage (>=5.0)", "dnspython (>=1.16.0,<2.0)", "idna", "objgraph", "psutil (>=5.7.0)", "requests", "setuptools"]
 
-[[package]]
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-description = "Lightweight in-process concurrent programming"
-optional = false
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-    {file = "greenlet-2.0.2.tar.gz", hash = "sha256:e7c8dc13af7db097bed64a051d2dd49e9f0af495c26995c00a9ee842690d34c0"},
-]
-
-[package.extras]
-docs = ["Sphinx", "docutils (<0.18)"]
-test = ["objgraph", "psutil"]
-
 [[package]]
 name = "greenlet"
 version = "3.0.0a1"
@@ -1236,17 +1163,17 @@ test = ["objgraph", "psutil"]
 
 [[package]]
 name = "gunicorn"
-version = "20.1.0"
+version = "21.2.0"
 description = "WSGI HTTP Server for UNIX"
 optional = false
 python-versions = ">=3.5"
 files = [
-    {file = "gunicorn-20.1.0-py3-none-any.whl", hash = "sha256:9dcc4547dbb1cb284accfb15ab5667a0e5d1881cc443e0677b4882a4067a807e"},
-    {file = "gunicorn-20.1.0.tar.gz", hash = "sha256:e0a968b5ba15f8a328fdfd7ab1fcb5af4470c28aaf7e55df02a99bc13138e6e8"},
+    {file = "gunicorn-21.2.0-py3-none-any.whl", hash = "sha256:3213aa5e8c24949e792bcacfc176fef362e7aac80b76c56f6b5122bf350722f0"},
+    {file = "gunicorn-21.2.0.tar.gz", hash = "sha256:88ec8bff1d634f98e61b9f65bc4bf3cd918a90806c6f5c48bc5603849ec81033"},
 ]
 
 [package.dependencies]
-setuptools = ">=3.0"
+packaging = "*"
 
 [package.extras]
 eventlet = ["eventlet (>=0.24.1)"]
@@ -3155,4 +3082,4 @@ testing = ["coverage (>=5.0.3)", "zope.event", "zope.testing"]
 [metadata]
 lock-version = "2.0"
 python-versions = ">=3.8.1,<4.0"
-content-hash = "12bfb3d093421fb24c5728d0a48e82685edc6814cdf80b471fbdc26fe01c2618"
+content-hash = "0db97f9a7aa20c4f43b9d934777850449fda75104c763b8758860a9971846451"
diff --git a/pyproject.toml b/pyproject.toml
index 62698f23..b2f20b2c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -121,7 +121,7 @@ flask-assets = {git = "https://github.com/christopherpickering/flask-assets.git"
 flask-redis = "^0.4.0"
 flask-session2 = "^1.2.0"
 gevent = "^23.0.0"
-gunicorn = "^20.1.0"
+gunicorn = "^21.0.0"
 is-safe-url = "^1.0"
 paramiko = "^3.0.0"
 pathvalidate = "^3.0.0"