diff --git a/pyproject.toml b/pyproject.toml
index 13244b2f..10346bac 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -61,6 +61,7 @@ dependencies = [
     "tomli-w",
     "aiofiles>=24.1.0",
     "aiohttp>=3.9.0",
+    "chardet>=5.0.0",
     "deepagents>=0.2.5",
     "json-repair>=0.54.0",
     "openpyxl>=3.1.5",