diff --git a/poetry.lock b/poetry.lock
index fae3a087..79da9786 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,4 +1,4 @@
-# This file is automatically @generated by Poetry 1.5.0 and should not be changed by hand.
+# This file is automatically @generated by Poetry 1.5.1 and should not be changed by hand.
 
 [[package]]
 name = "appnope"
@@ -1205,13 +1205,13 @@ files = [
 
 [[package]]
 name = "openpyxl"
-version = "3.0.10"
+version = "3.1.2"
 description = "A Python library to read/write Excel 2010 xlsx/xlsm files"
 optional = false
 python-versions = ">=3.6"
 files = [
-    {file = "openpyxl-3.0.10-py2.py3-none-any.whl", hash = "sha256:0ab6d25d01799f97a9464630abacbb34aafecdcaa0ef3cba6d6b3499867d0355"},
-    {file = "openpyxl-3.0.10.tar.gz", hash = "sha256:e47805627aebcf860edb4edf7987b1309c1b3632f3750538ed962bbcc3bd7449"},
+    {file = "openpyxl-3.1.2-py2.py3-none-any.whl", hash = "sha256:f91456ead12ab3c6c2e9491cf33ba6d08357d802192379bb482f1033ade496f5"},
+    {file = "openpyxl-3.1.2.tar.gz", hash = "sha256:a6f5977418eff3b2d5500d54d9db50c8277a368436f4e4f8ddb1be3422870184"},
 ]
 
 [package.dependencies]
@@ -2236,4 +2236,4 @@ testing = ["big-O", "flake8 (<5)", "jaraco.functools", "jaraco.itertools", "more
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.9"
-content-hash = "4c8cc15797080b8131b35c7f79381793e76714ef0db342e5e84804b76873bb71"
+content-hash = "47681a34e8c30a9445498bd9a41abd009814e16618434dcbe1052a8afbde800e"
diff --git a/pyproject.toml b/pyproject.toml
index 2f428772..437f9322 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -45,7 +45,7 @@ python-redmine = "^2.4.0"
 sentry-sdk = "^1.26.0"
 whitenoise = "^6.5.0"
 django-hurricane = "^1.3.4"
-openpyxl = "3.0.10" # TODO: dependency of `pyexcel-xlsx` Remove as soon as https://github.com/pyexcel/pyexcel-xlsx/issues/52 is resolved.
+openpyxl = "3.1.2" # TODO: dependency of `pyexcel-xlsx` Remove as soon as https://github.com/pyexcel/pyexcel-xlsx/issues/52 is resolved.
 
 [tool.poetry.dev-dependencies]
 black = "23.3.0"