diff --git a/backend-agent/pyproject.toml b/backend-agent/pyproject.toml
index 008e6f0..d39eadd 100644
--- a/backend-agent/pyproject.toml
+++ b/backend-agent/pyproject.toml
@@ -22,7 +22,7 @@ dependencies = [
     'Flask-SQLAlchemy==3.1.1',
     'langchain>=0.3.0,<0.4.0',
     'langchain-community>=0.3.0,<0.4.0',
-    'langchain-core>=0.3.0,<0.4.0',
+    'langchain-core>=0.3.0,<1.2.0',
     'langchain-text-splitters>=0.3.0,<0.4.0',
     'PyYAML==6.0.3',
     'requests==2.32.5',
diff --git a/backend-agent/uv.lock b/backend-agent/uv.lock
index 1e0612b..14f6234 100644
--- a/backend-agent/uv.lock
+++ b/backend-agent/uv.lock
@@ -2706,7 +2706,7 @@ wheels = [
 
 [[package]]
 name = "langchain-core"
-version = "0.3.79"
+version = "0.3.80"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "jsonpatch" },
@@ -2717,9 +2717,9 @@ dependencies = [
     { name = "tenacity" },
     { name = "typing-extensions" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/c8/99/f926495f467e0f43289f12e951655d267d1eddc1136c3cf4dd907794a9a7/langchain_core-0.3.79.tar.gz", hash = "sha256:024ba54a346dd9b13fb8b2342e0c83d0111e7f26fa01f545ada23ad772b55a60", size = 580895, upload-time = "2025-10-09T21:59:08.359Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/49/49/f76647b7ba1a6f9c11b0343056ab4d3e5fc445981d205237fed882b2ad60/langchain_core-0.3.80.tar.gz", hash = "sha256:29636b82513ab49e834764d023c4d18554d3d719a185d37b019d0a8ae948c6bb", size = 583629, upload-time = "2025-11-19T22:23:18.771Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/fc/71/46b0efaf3fc6ad2c2bd600aef500f1cb2b7038a4042f58905805630dd29d/langchain_core-0.3.79-py3-none-any.whl", hash = "sha256:92045bfda3e741f8018e1356f83be203ec601561c6a7becfefe85be5ddc58fdb", size = 449779, upload-time = "2025-10-09T21:59:06.493Z" },
+    { url = "https://files.pythonhosted.org/packages/da/e8/e7a090ebe37f2b071c64e81b99fb1273b3151ae932f560bb94c22f191cde/langchain_core-0.3.80-py3-none-any.whl", hash = "sha256:2141e3838d100d17dce2359f561ec0df52c526bae0de6d4f469f8026c5747456", size = 450786, upload-time = "2025-11-19T22:23:17.133Z" },
 ]
 
 [[package]]
@@ -5429,7 +5429,7 @@ requires-dist = [
     { name = "gptfuzzer", git = "https://github.com/marcorosa/GPTFuzz?rev=no-vllm" },
     { name = "langchain", specifier = ">=0.3.0,<0.4.0" },
     { name = "langchain-community", specifier = ">=0.3.0,<0.4.0" },
-    { name = "langchain-core", specifier = ">=0.3.0,<0.4.0" },
+    { name = "langchain-core", specifier = ">=0.3.0,<1.2.0" },
     { name = "langchain-text-splitters", specifier = ">=0.3.0,<0.4.0" },
     { name = "ollama", specifier = "==0.6.1" },
     { name = "pandas", specifier = "==2.3.3" },