diff --git a/pyproject.toml b/pyproject.toml
index 448bc18ef..40e6bee7c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -13,7 +13,7 @@ readme = "README.md"
 dependencies = [
     "lxml>=4.9.3,<6.0.0",
     "openai>=1.11.0,<2.0.0",
-    "langchain>=0.2.5,<0.3.0",
+    "langchain>=0.2.5,<0.4.0",
     "rich>=13.6.0,<14.0.0",
     "PettingZoo==1.24.3",
     "redis-om>=0.3.0,<0.4.0",