diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index da17562a..9595caa2 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -42,6 +42,7 @@ dependencies = [
     "redis>=6.2.0",
     "xlsxwriter>=3.2.5",
     "python-calamine>=0.4.0",
+    "xlrd>=2.0.2",
 ]
 [[tool.uv.index]]
 name = "default"