diff --git a/backend-agent/pyproject.toml b/backend-agent/pyproject.toml
index 008e6f0..227dd2d 100644
--- a/backend-agent/pyproject.toml
+++ b/backend-agent/pyproject.toml
@@ -20,7 +20,7 @@ dependencies = [
     'Flask-Cors==6.0.1',
     'flask_sock==0.7.0',
     'Flask-SQLAlchemy==3.1.1',
-    'langchain>=0.3.0,<0.4.0',
+    'langchain>=0.3.0,<1.2.0',
     'langchain-community>=0.3.0,<0.4.0',
     'langchain-core>=0.3.0,<0.4.0',
     'langchain-text-splitters>=0.3.0,<0.4.0',
diff --git a/backend-agent/uv.lock b/backend-agent/uv.lock
index 1e0612b..13fb200 100644
--- a/backend-agent/uv.lock
+++ b/backend-agent/uv.lock
@@ -5427,7 +5427,7 @@ requires-dist = [
     { name = "flask-sqlalchemy", specifier = "==3.1.1" },
     { name = "garak", specifier = "==0.11.0" },
     { name = "gptfuzzer", git = "https://github.com/marcorosa/GPTFuzz?rev=no-vllm" },
-    { name = "langchain", specifier = ">=0.3.0,<0.4.0" },
+    { name = "langchain", specifier = ">=0.3.0,<1.2.0" },
     { name = "langchain-community", specifier = ">=0.3.0,<0.4.0" },
     { name = "langchain-core", specifier = ">=0.3.0,<0.4.0" },
     { name = "langchain-text-splitters", specifier = ">=0.3.0,<0.4.0" },