update service deps

Author: alexechoi

deep_security/pyproject.toml

@@ -10,7 +10,7 @@ license = { text = "MIT" }
 requires-python = ">=3.10"
 dependencies = [
     "langchain>=0.3.0",
-    "langgraph>=0.5.4",
+    "langgraph>=0.5.4,<0.6",
     "langchain-community>=0.3.9",
     "langchain-openai>=0.3.28",
     "langchain-anthropic>=0.3.15",