diff --git a/pyproject.toml b/pyproject.toml
index f9349d77..7c857f6a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -22,7 +22,7 @@ dependencies = [
     "together>=0.2.4,<1.4.0",
     "pydantic>=2.5.0,<3.0.0",
     "beartype>=0.14.0,<0.20.0",
-    "langchain-openai>=0.1.8,<0.2",
+    "langchain-openai>=0.1.8,<0.4",
     "hiredis>=3.0.0",
     "aact"
 ]