diff --git a/pyproject.toml b/pyproject.toml
index 5cf4b05..0ca182b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -35,7 +35,7 @@ dev = [
     "pytest>=8.0.0",
     "pytest-asyncio>=0.21.0",
     "pytest-cov>=4.1.0",
-    "openpyxl>=3.1.0",
+    "openpyxl>=3.1.5",
     "black>=23.0.0",
     "flake8>=6.0.0",
     "mypy>=1.0.0",
diff --git a/requirements.txt b/requirements.txt
index bdd6355..eb69017 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 # Core dependencies
 playwright>=1.40.0
-openpyxl>=3.1.0
+openpyxl>=3.1.5
 
 # Development dependencies (install with: pip install -e ".[dev]")
 # pytest>=8.0.0