diff --git a/pyproject.toml b/pyproject.toml
index e6b542a65e..6d2a5ea2f6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -125,9 +125,9 @@ visualization = [
 ]
 
 agents = [
-    "langchain>=1,<1.2.4",
+    "langchain==1.2.3",
     "langchain-chroma>=1,<2",
-    "langchain-core>=1,<2",
+    "langchain-core==1.2.3",
     "langchain-openai>=1,<2",
     "langchain-text-splitters>=1,<2",
     "langchain-huggingface>=1,<2",
diff --git a/uv.lock b/uv.lock
index 75f839303f..1820fd013f 100644
--- a/uv.lock
+++ b/uv.lock
@@ -2020,9 +2020,9 @@ requires-dist = [
     { name = "hydra-core", marker = "extra == 'perception'", specifier = ">=1.3.0" },
     { name = "ipykernel", marker = "extra == 'misc'" },
     { name = "kaleido", marker = "extra == 'manipulation'", specifier = ">=0.2.1" },
-    { name = "langchain", marker = "extra == 'agents'", specifier = ">=1,<1.2.4" },
+    { name = "langchain", marker = "extra == 'agents'", specifier = "==1.2.3" },
     { name = "langchain-chroma", marker = "extra == 'agents'", specifier = ">=1,<2" },
-    { name = "langchain-core", marker = "extra == 'agents'", specifier = ">=1,<2" },
+    { name = "langchain-core", marker = "extra == 'agents'", specifier = "==1.2.3" },
     { name = "langchain-huggingface", marker = "extra == 'agents'", specifier = ">=1,<2" },
     { name = "langchain-ollama", marker = "extra == 'agents'", specifier = ">=1,<2" },
     { name = "langchain-openai", marker = "extra == 'agents'", specifier = ">=1,<2" },
@@ -3982,7 +3982,7 @@ wheels = [
 
 [[package]]
 name = "langchain-core"
-version = "1.2.6"
+version = "1.2.3"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "jsonpatch" },
@@ -3994,9 +3994,9 @@ dependencies = [
     { name = "typing-extensions" },
     { name = "uuid-utils" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/b9/ce/ba5ed5ea6df22965b2893c2ed28ebb456204962723d408904c4acfa5e942/langchain_core-1.2.6.tar.gz", hash = "sha256:b4e7841dd7f8690375aa07c54739178dc2c635147d475e0c2955bf82a1afa498", size = 833343, upload-time = "2026-01-02T21:35:44.749Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/70/ea/8380184b287da43d3d2556475b985cf3e27569e9d8bbe33195600a98cabb/langchain_core-1.2.3.tar.gz", hash = "sha256:61f5197aa101cd5605879ef37f2b0ac56c079974d94d347849b8d4fe18949746", size = 803567, upload-time = "2025-12-18T20:13:10.574Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/6f/40/0655892c245d8fbe6bca6d673ab5927e5c3ab7be143de40b52289a0663bc/langchain_core-1.2.6-py3-none-any.whl", hash = "sha256:aa6ed954b4b1f4504937fe75fdf674317027e9a91ba7a97558b0de3dc8004e34", size = 489096, upload-time = "2026-01-02T21:35:43.391Z" },
+    { url = "https://files.pythonhosted.org/packages/f0/57/cfc1d12e273d33d16bab7ce9a135244e6f5677a92a5a99e69a61b22b7d93/langchain_core-1.2.3-py3-none-any.whl", hash = "sha256:c3501cf0219daf67a0ae23f6d6bdf3b41ab695efd8f0f3070a566e368b8c3dc7", size = 476384, upload-time = "2025-12-18T20:13:08.998Z" },
 ]
 
 [[package]]
@@ -4028,16 +4028,16 @@ wheels = [
 
 [[package]]
 name = "langchain-openai"
-version = "1.1.7"
+version = "1.1.6"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "langchain-core" },
     { name = "openai" },
     { name = "tiktoken" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/38/b7/30bfc4d1b658a9ee524bcce3b0b2ec9c45a11c853a13c4f0c9da9882784b/langchain_openai-1.1.7.tar.gz", hash = "sha256:f5ec31961ed24777548b63a5fe313548bc6e0eb9730d6552b8c6418765254c81", size = 1039134, upload-time = "2026-01-07T19:44:59.728Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/ae/67/228dc28b4498ea16422577013b5bb4ba35a1b99f8be975d6747c7a9f7e6a/langchain_openai-1.1.6.tar.gz", hash = "sha256:e306612654330ae36fb6bbe36db91c98534312afade19e140c3061fe4208dac8", size = 1038310, upload-time = "2025-12-18T17:58:52.84Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/64/a1/50e7596aca775d8c3883eceeaf47489fac26c57c1abe243c00174f715a8a/langchain_openai-1.1.7-py3-none-any.whl", hash = "sha256:34e9cd686aac1a120d6472804422792bf8080a2103b5d21ee450c9e42d053815", size = 84753, upload-time = "2026-01-07T19:44:58.629Z" },
+    { url = "https://files.pythonhosted.org/packages/db/5b/1f6521df83c1a8e8d3f52351883b59683e179c0aa1bec75d0a77a394c9e7/langchain_openai-1.1.6-py3-none-any.whl", hash = "sha256:c42d04a67a85cee1d994afe400800d2b09ebf714721345f0b651eb06a02c3948", size = 84701, upload-time = "2025-12-18T17:58:51.527Z" },
 ]
 
 [[package]]