diff --git a/pyproject.toml b/pyproject.toml
index e25c78c75..d26b36950 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -33,6 +33,7 @@ dependencies = [
     "tantivy",
     "tenacity",
     "uvicorn",
+    "orjson",
 ]
 dynamic = ["version"]