diff --git a/backend/poetry.lock b/backend/poetry.lock
index 20ad444af..353160a76 100644
--- a/backend/poetry.lock
+++ b/backend/poetry.lock
@@ -999,13 +999,13 @@ requests = "*"
 
 [[package]]
 name = "openpyxl"
-version = "3.0.10"
+version = "3.1.5"
 description = "A Python library to read/write Excel 2010 xlsx/xlsm files"
 optional = false
-python-versions = ">=3.6"
+python-versions = ">=3.8"
 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-3.1.5-py2.py3-none-any.whl", hash = "sha256:5282c12b107bffeef825f4617dc029afaf41d0ea60823bbb665ef3079dc79de2"},
+    {file = "openpyxl-3.1.5.tar.gz", hash = "sha256:cf0e3cf56142039133628b5acffe8ef0c12bc902d2aadd3e0fe5878dc08d1050"},
 ]
 
 [package.dependencies]
@@ -1949,4 +1949,4 @@ files = [
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.12"
-content-hash = "81a2742481b90c69cedd4bd16cea8435f872a9f7fc663d1a73c86b9a9be55632"
+content-hash = "f7442da957182ff6bdc95b4ec578bda811a76210d93af8e0a1b468cbb9d9bde1"
diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index a8a9d6115..133fa6307 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -43,7 +43,7 @@ python-redmine = "^2.5.0"
 sentry-sdk = "^2.7.1"
 whitenoise = "^6.7.0"
 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 = "3.1.5" # TODO: dependency of `pyexcel-xlsx` Remove as soon as https://github.com/pyexcel/pyexcel-xlsx/issues/52 is resolved.
 psycopg = {extras = ["binary"], version = "^3.2.1"}
 
 [tool.poetry.group.dev.dependencies]