diff --git a/poetry.lock b/poetry.lock
index 0057f24f..4e7d53ad 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -950,13 +950,13 @@ requests = "*"
 
 [[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]
@@ -1944,4 +1944,4 @@ files = [
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.11"
-content-hash = "fa392e38f6f05cca26740f5a9cd612fdf385df178f3d28dabd5cdb6df4d53fb7"
+content-hash = "8362f06eb6026014fc18311a23993eb9d1c6d880009496b67c1ced414ca8e3de"
diff --git a/pyproject.toml b/pyproject.toml
index 660bb046..2d37e4ae 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -45,7 +45,7 @@ python-redmine = "^2.5.0"
 sentry-sdk = "^1.45.0"
 whitenoise = "^6.6.0"
 django-hurricane = "^1.5.0"
-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.group.dev.dependencies]
 ruff = "^0.3.7"