diff --git a/pyproject.toml b/pyproject.toml
index 6d01456fa..1fd786902 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -51,7 +51,7 @@ websockets = "^11.0.2"
 tiktoken = "^0.3.3"
 wikipedia = "^1.4.0"
 gptcache = "^0.1.23"
-langchain-serve = { version = "^0.0.31", optional = true }
+langchain-serve = {version = "^0.0.31", optional = true}
 
 [tool.poetry.group.dev.dependencies]
 black = "^23.1.0"