diff --git a/package-lock.json b/package-lock.json
index 0205535..7313728 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -28,6 +28,7 @@
         "gigachat": "^0.0.14",
         "jsdom": "^25.0.1",
         "jsonwebtoken": "^9.0.2",
+        "langchain": "^0.3.7",
         "langchain-gigachat": "^0.0.11",
         "mongodb": "^6.12.0",
         "mongoose": "^8.9.2",