diff --git a/pyproject.toml b/pyproject.toml
index b0a6a82..66f0cdb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -70,7 +70,7 @@ dev = [
     "pytest>=7.0",
     "pytest-cov>=4.0",
     "flask>=2.0",
-    "openpyxl>=3.0",
+    "openpyxl>=3.1.5",
 ]
 server = [
     "flask>=2.0",