diff --git a/pkgs/development/python-modules/langchain-aws/default.nix b/pkgs/development/python-modules/langchain-aws/default.nix
index 65dd79a8498bc..83e063e9cc54c 100644
--- a/pkgs/development/python-modules/langchain-aws/default.nix
+++ b/pkgs/development/python-modules/langchain-aws/default.nix
@@ -2,25 +2,31 @@
   lib,
   buildPythonPackage,
   fetchFromGitHub,
+
+  # build-system
+  poetry-core,
+
+  # dependencies
   boto3,
   langchain-core,
   numpy,
-  poetry-core,
-  pytestCheckHook,
-  pytest-asyncio,
+
+  # tests
   langchain-standard-tests,
+  pytest-asyncio,
+  pytestCheckHook,
 }:
 
 buildPythonPackage rec {
   pname = "langchain-aws";
-  version = "0.1.17";
+  version = "0.2.0";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain-aws";
     rev = "refs/tags/v${version}";
-    hash = "sha256-n9nQheuUZMrjZMpR3aqbrRb/AhcgiF4CFO9ROh9aFNc=";
+    hash = "sha256-P9CfAVpKh7djhUQc3DyyJTWqs9RbrTeLyynLei0x00o=";
   };
 
   postPatch = ''
diff --git a/pkgs/development/python-modules/langchain-azure-dynamic-sessions/default.nix b/pkgs/development/python-modules/langchain-azure-dynamic-sessions/default.nix
index 24c1fe66d5eb8..0d9ce18648f69 100644
--- a/pkgs/development/python-modules/langchain-azure-dynamic-sessions/default.nix
+++ b/pkgs/development/python-modules/langchain-azure-dynamic-sessions/default.nix
@@ -1,38 +1,42 @@
 {
   lib,
-  azure-identity,
   buildPythonPackage,
   fetchFromGitHub,
-  freezegun,
+
+  # build-system
+  poetry-core,
+
+  # dependencies
+  azure-identity,
   langchain-core,
   langchain-openai,
+
+  # tests
+  freezegun,
   lark,
   pandas,
-  poetry-core,
   pytest-asyncio,
   pytest-mock,
   pytest-socket,
   pytestCheckHook,
-  pythonOlder,
   requests-mock,
   responses,
   syrupy,
   toml,
+
   nix-update-script,
 }:
 
 buildPythonPackage rec {
   pname = "langchain-azure-dynamic-sessions";
-  version = "0.1.0";
+  version = "0.2.0";
   pyproject = true;
 
-  disabled = pythonOlder "3.8";
-
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain";
     rev = "refs/tags/langchain-azure-dynamic-sessions==${version}";
-    hash = "sha256-jz4IBMnWuk8FsSsyfLN14B0xWZrmZrvEW95a45S+FOo=";
+    hash = "sha256-tgvoOSr4tpi+tFBan+kw8FZUfUJHcQXv9e1nyeGP0so=";
   };
 
   sourceRoot = "${src.name}/libs/partners/azure-dynamic-sessions";
diff --git a/pkgs/development/python-modules/langchain-chroma/default.nix b/pkgs/development/python-modules/langchain-chroma/default.nix
index 2331babc4d7e4..d5a5a53ac90f4 100644
--- a/pkgs/development/python-modules/langchain-chroma/default.nix
+++ b/pkgs/development/python-modules/langchain-chroma/default.nix
@@ -12,20 +12,22 @@
 
 buildPythonPackage rec {
   pname = "langchain-chroma";
-  version = "0.1.2";
+  version = "0.1.4";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain";
     rev = "refs/tags/langchain-chroma==${version}";
-    hash = "sha256-PQ3bepiAqzWhQdKofQSzQKxRrwI6dxBfSNV91462aJE=";
+    hash = "sha256-pU7H8OYXa+JjdkSO36xESPI6r3xA+9cFXxeJnfpYuHc=";
   };
 
   sourceRoot = "${src.name}/libs/partners/chroma";
 
   build-system = [ poetry-core ];
 
+  pythonRelaxDeps = [ "chromadb" ];
+
   dependencies = [
     langchain-core
     chromadb
diff --git a/pkgs/development/python-modules/langchain-community/default.nix b/pkgs/development/python-modules/langchain-community/default.nix
index ba7b07d1aea64..8f42413117ae0 100644
--- a/pkgs/development/python-modules/langchain-community/default.nix
+++ b/pkgs/development/python-modules/langchain-community/default.nix
@@ -12,6 +12,7 @@
   langchain-core,
   langchain,
   langsmith,
+  pydantic-settings,
   pyyaml,
   requests,
   sqlalchemy,
@@ -37,26 +38,29 @@
 
 buildPythonPackage rec {
   pname = "langchain-community";
-  version = "0.2.16";
+  version = "0.3.0";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain";
     rev = "refs/tags/langchain-community==${version}";
-    hash = "sha256-0FKbx/ZPX7sioof5pMdqpnVWc46+eOiTIseyxwYK49E=";
+    hash = "sha256-8kF7KlXcWbquRtp8EumkFYhGd0onxifVZsts0SU1dzE=";
   };
 
   sourceRoot = "${src.name}/libs/community";
 
   build-system = [ poetry-core ];
 
+  pythonRelaxDeps = [ "pydantic-settings" ];
+
   dependencies = [
     aiohttp
     dataclasses-json
     langchain-core
     langchain
     langsmith
+    pydantic-settings
     pyyaml
     requests
     sqlalchemy
diff --git a/pkgs/development/python-modules/langchain-core/default.nix b/pkgs/development/python-modules/langchain-core/default.nix
index 4fa5de47893ed..0d835c4078c5e 100644
--- a/pkgs/development/python-modules/langchain-core/default.nix
+++ b/pkgs/development/python-modules/langchain-core/default.nix
@@ -34,14 +34,14 @@
 
 buildPythonPackage rec {
   pname = "langchain-core";
-  version = "0.2.38";
+  version = "0.3.0";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain";
     rev = "refs/tags/langchain-core==${version}";
-    hash = "sha256-3nRirzQe5KCVoeJ29fYelYuOD6r4adJof4NXreyfrzY=";
+    hash = "sha256-BCqrJuy7R2jT3QmTvYwn8gHX7bc6Tq8HArK+F3PjBhw=";
   };
 
   sourceRoot = "${src.name}/libs/core";
@@ -102,6 +102,12 @@ buildPythonPackage rec {
       # Compares with machine-specific timings
       "test_rate_limit_invoke"
       "test_rate_limit_stream"
+      # flaky: assert (1726352133.7419367 - 1726352132.2697523) < 1
+      "test_benchmark_model"
+
+      # TypeError: exceptions must be derived from Warning, not <class 'NoneType'>
+      "test_chat_prompt_template_variable_names"
+      "test_create_model_v2"
     ]
     ++ lib.optionals stdenv.isDarwin [
       # Langchain-core the following tests due to the test comparing execution time with magic values.
diff --git a/pkgs/development/python-modules/langchain-huggingface/default.nix b/pkgs/development/python-modules/langchain-huggingface/default.nix
index 774482e5bbcde..51f201ea694fc 100644
--- a/pkgs/development/python-modules/langchain-huggingface/default.nix
+++ b/pkgs/development/python-modules/langchain-huggingface/default.nix
@@ -2,39 +2,44 @@
   lib,
   buildPythonPackage,
   fetchFromGitHub,
-  freezegun,
+
+  # build-system
+  poetry-core,
+
+  # dependencies
   huggingface-hub,
   langchain-core,
   sentence-transformers,
   tokenizers,
   transformers,
+
+  # tests
+  freezegun,
+  httpx,
   lark,
   pandas,
-  poetry-core,
   pytest-asyncio,
   pytest-mock,
   pytest-socket,
   pytestCheckHook,
-  pythonOlder,
   requests-mock,
   responses,
   syrupy,
   toml,
+
   nix-update-script,
 }:
 
 buildPythonPackage rec {
   pname = "langchain-huggingface";
-  version = "0.0.3";
+  version = "0.1.0";
   pyproject = true;
 
-  disabled = pythonOlder "3.8";
-
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain";
     rev = "refs/tags/langchain-huggingface==${version}";
-    hash = "sha256-4k3C6T2N7SBM/wP8KAwMQqt9DkXDdYNt2i/OkZilWw0=";
+    hash = "sha256-ESWhhjWjCbBV/3KjeSwEQzvK6os1mmc3at+8gonfGt4=";
   };
 
   sourceRoot = "${src.name}/libs/partners/huggingface";
@@ -51,6 +56,7 @@ buildPythonPackage rec {
 
   nativeCheckInputs = [
     freezegun
+    httpx
     lark
     pandas
     pytest-asyncio
diff --git a/pkgs/development/python-modules/langchain-mongodb/default.nix b/pkgs/development/python-modules/langchain-mongodb/default.nix
index 0b0a6b22fd63d..9d8f59e3c771e 100644
--- a/pkgs/development/python-modules/langchain-mongodb/default.nix
+++ b/pkgs/development/python-modules/langchain-mongodb/default.nix
@@ -2,37 +2,42 @@
   lib,
   buildPythonPackage,
   fetchFromGitHub,
-  freezegun,
-  langchain,
+
+  # build-system
+  poetry-core,
+
+  # dependencies
   langchain-core,
+  numpy,
   pymongo,
+
+  freezegun,
+  httpx,
+  langchain,
   lark,
   pandas,
-  poetry-core,
   pytest-asyncio,
+  pytestCheckHook,
   pytest-mock,
   pytest-socket,
-  pytestCheckHook,
-  pythonOlder,
   requests-mock,
   responses,
   syrupy,
   toml,
+
   nix-update-script,
 }:
 
 buildPythonPackage rec {
   pname = "langchain-mongodb";
-  version = "0.1.8";
+  version = "0.2.0";
   pyproject = true;
 
-  disabled = pythonOlder "3.8";
-
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain";
     rev = "refs/tags/langchain-mongodb==${version}";
-    hash = "sha256-fjSvn9O/CrKBexcwuILXFR7AGx/tZtGDWjA0L6XV4Hk=";
+    hash = "sha256-Jd9toXkS9dGtSIrJQ/5W+swV1z2BJOJKBtkyGzj3oSc=";
   };
 
   sourceRoot = "${src.name}/libs/partners/mongodb";
@@ -41,22 +46,18 @@ buildPythonPackage rec {
 
   dependencies = [
     langchain-core
+    numpy
     pymongo
   ];
 
   nativeCheckInputs = [
     freezegun
+    httpx
     langchain
-    lark
-    pandas
     pytest-asyncio
-    pytest-mock
-    pytest-socket
     pytestCheckHook
-    requests-mock
-    responses
+    pytest-mock
     syrupy
-    toml
   ];
 
   pytestFlagsArray = [ "tests/unit_tests" ];
diff --git a/pkgs/development/python-modules/langchain-openai/default.nix b/pkgs/development/python-modules/langchain-openai/default.nix
index 5bb20007a7ed9..1410e72aeac1b 100644
--- a/pkgs/development/python-modules/langchain-openai/default.nix
+++ b/pkgs/development/python-modules/langchain-openai/default.nix
@@ -2,38 +2,42 @@
   lib,
   buildPythonPackage,
   fetchFromGitHub,
-  freezegun,
+
+  # build-system
+  poetry-core,
+
+  # dependencies
   langchain-core,
-  langchain-standard-tests,
   openai,
   tiktoken,
+
+  # tests
+  freezegun,
+  langchain-standard-tests,
   lark,
   pandas,
-  poetry-core,
   pytest-asyncio,
+  pytestCheckHook,
   pytest-mock,
   pytest-socket,
-  pytestCheckHook,
-  pythonOlder,
   requests-mock,
   responses,
   syrupy,
   toml,
+
   nix-update-script,
 }:
 
 buildPythonPackage rec {
   pname = "langchain-openai";
-  version = "0.1.23";
+  version = "0.2.0";
   pyproject = true;
 
-  disabled = pythonOlder "3.8";
-
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain";
     rev = "refs/tags/langchain-openai==${version}";
-    hash = "sha256-j+oaC0xmvDBsAREXwKF+kmFlplN43ROH6n9j1+H1ufk=";
+    hash = "sha256-3wTSvvPOMZciEqPxpcjrcqEpK//qwsEmvZnlZBfjltQ=";
   };
 
   sourceRoot = "${src.name}/libs/partners/openai";
@@ -57,9 +61,9 @@ buildPythonPackage rec {
     lark
     pandas
     pytest-asyncio
+    pytestCheckHook
     pytest-mock
     pytest-socket
-    pytestCheckHook
     requests-mock
     responses
     syrupy
diff --git a/pkgs/development/python-modules/langchain-standard-tests/default.nix b/pkgs/development/python-modules/langchain-standard-tests/default.nix
index 9b45f412f3373..3bec0ee76be3e 100644
--- a/pkgs/development/python-modules/langchain-standard-tests/default.nix
+++ b/pkgs/development/python-modules/langchain-standard-tests/default.nix
@@ -1,10 +1,19 @@
 {
   lib,
   buildPythonPackage,
+
+  # build-system
   poetry-core,
+
+  # dependencies
   httpx,
   langchain-core,
+  syrupy,
+
+  # buildInputs
   pytest,
+
+  # tests
   numpy,
   pytest-asyncio,
   pytestCheckHook,
@@ -23,8 +32,9 @@ buildPythonPackage rec {
   build-system = [ poetry-core ];
 
   dependencies = [
-    langchain-core
     httpx
+    langchain-core
+    syrupy
   ];
 
   buildInputs = [ pytest ];
diff --git a/pkgs/development/python-modules/langchain-text-splitters/default.nix b/pkgs/development/python-modules/langchain-text-splitters/default.nix
index 5832e387e3033..a19f3ceb7d7ef 100644
--- a/pkgs/development/python-modules/langchain-text-splitters/default.nix
+++ b/pkgs/development/python-modules/langchain-text-splitters/default.nix
@@ -10,31 +10,35 @@
   langchain-core,
 
   # tests
+  httpx,
   pytest-asyncio,
   pytestCheckHook,
 }:
 
 buildPythonPackage rec {
   pname = "langchain-text-splitters";
-  version = "0.2.4";
+  version = "0.3.0";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain";
     rev = "refs/tags/langchain-text-splitters==${version}";
-    hash = "sha256-8n5eImRXOG/3tN/59Gd2/GpoGpt7P2ABj0T4pJi6xrk=";
+    hash = "sha256-Z0UAUhOjC0wgCY/f1aWsnjFyOPYz/6JnloEKT6b6Ii0=";
   };
 
   sourceRoot = "${src.name}/libs/text-splitters";
 
   build-system = [ poetry-core ];
 
-  dependencies = [ langchain-core ];
+  dependencies = [
+    langchain-core
+  ];
 
   pythonImportsCheck = [ "langchain_text_splitters" ];
 
   nativeCheckInputs = [
+    httpx
     pytest-asyncio
     pytestCheckHook
   ];
diff --git a/pkgs/development/python-modules/langchain/default.nix b/pkgs/development/python-modules/langchain/default.nix
index 59f0c09ec10cd..c2184e84254f3 100644
--- a/pkgs/development/python-modules/langchain/default.nix
+++ b/pkgs/development/python-modules/langchain/default.nix
@@ -27,6 +27,7 @@
 
   # tests
   freezegun,
+  httpx,
   lark,
   pandas,
   pytest-asyncio,
@@ -41,14 +42,14 @@
 
 buildPythonPackage rec {
   pname = "langchain";
-  version = "0.2.16";
+  version = "0.3.0";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain";
     rev = "refs/tags/langchain==${version}";
-    hash = "sha256-8n5eImRXOG/3tN/59Gd2/GpoGpt7P2ABj0T4pJi6xrk=";
+    hash = "sha256-2dHsZWn1MN/gLnUdYp84gbtWkvB0j0iieij4W9tzPzY=";
   };
 
   sourceRoot = "${src.name}/libs/langchain";
@@ -75,6 +76,7 @@ buildPythonPackage rec {
 
   nativeCheckInputs = [
     freezegun
+    httpx
     lark
     pandas
     pytest-asyncio
diff --git a/pkgs/development/python-modules/langgraph-checkpoint-sqlite/default.nix b/pkgs/development/python-modules/langgraph-checkpoint-sqlite/default.nix
index b8bf9df2eaa98..e94cca80eb542 100644
--- a/pkgs/development/python-modules/langgraph-checkpoint-sqlite/default.nix
+++ b/pkgs/development/python-modules/langgraph-checkpoint-sqlite/default.nix
@@ -13,7 +13,7 @@
 
 buildPythonPackage rec {
   pname = "langgraph-checkpoint-sqlite";
-  version = "1.0.2";
+  version = "1.0.3";
   pyproject = true;
 
   disabled = pythonOlder "3.9";
@@ -22,7 +22,7 @@ buildPythonPackage rec {
     owner = "langchain-ai";
     repo = "langgraph";
     rev = "refs/tags/checkpointsqlite==${version}";
-    hash = "sha256-TUiZOf34jhs+nkeTsprtTdoVqDt7kZd8NxYLKX4l0kQ=";
+    hash = "sha256-/pHJtK691anqn2It4ZstCGXJS0JGtdKZvqS9f3ly+FQ=";
   };
 
   sourceRoot = "${src.name}/libs/checkpoint-sqlite";
diff --git a/pkgs/development/python-modules/langgraph-checkpoint/default.nix b/pkgs/development/python-modules/langgraph-checkpoint/default.nix
index 82323a80488ca..3857de5bd7353 100644
--- a/pkgs/development/python-modules/langgraph-checkpoint/default.nix
+++ b/pkgs/development/python-modules/langgraph-checkpoint/default.nix
@@ -39,6 +39,11 @@ buildPythonPackage rec {
     pytestCheckHook
   ];
 
+  disabledTests = [
+    # AssertionError
+    "test_serde_jsonplus"
+  ];
+
   passthru = {
     updateScript = langgraph-sdk.updateScript;
   };
diff --git a/pkgs/development/python-modules/langgraph/default.nix b/pkgs/development/python-modules/langgraph/default.nix
index cb442e8919f46..80e2faa682584 100644
--- a/pkgs/development/python-modules/langgraph/default.nix
+++ b/pkgs/development/python-modules/langgraph/default.nix
@@ -1,5 +1,6 @@
 {
   lib,
+  stdenv,
   buildPythonPackage,
   fetchFromGitHub,
 
@@ -35,14 +36,14 @@
 
 buildPythonPackage rec {
   pname = "langgraph";
-  version = "0.2.19";
+  version = "0.2.21";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langgraph";
     rev = "refs/tags/${version}";
-    hash = "sha256-qJIZAHftIKyWK0A/MjilalmmB8b8E7JtLnFn156hE08=";
+    hash = "sha256-1Ch2V85omAKnXK9rMihNtyjIoOvmVUm8Dbdo5GBoik4=";
   };
 
   postgresqlTestSetupPost = ''
@@ -61,6 +62,10 @@ buildPythonPackage rec {
 
   pythonImportsCheck = [ "langgraph" ];
 
+  # postgresql doesn't play nicely with the darwin sandbox:
+  # FATAL:  could not create shared memory segment: Operation not permitted
+  doCheck = !stdenv.isDarwin;
+
   nativeCheckInputs = [
     aiosqlite
     dataclasses-json
diff --git a/pkgs/development/python-modules/langsmith/default.nix b/pkgs/development/python-modules/langsmith/default.nix
index 16e3b19f71b39..c45edec702bc8 100644
--- a/pkgs/development/python-modules/langsmith/default.nix
+++ b/pkgs/development/python-modules/langsmith/default.nix
@@ -1,37 +1,40 @@
 {
   lib,
   stdenv,
-  anthropic,
-  attr,
   buildPythonPackage,
+  fetchFromGitHub,
+
+  # build-system
+  poetry-core,
+
+  # dependencies
+  orjson,
+  pydantic,
+  requests,
+
+  # tests
+  anthropic,
   dataclasses-json,
   fastapi,
-  fetchFromGitHub,
   freezegun,
   httpx,
   instructor,
-  orjson,
-  poetry-core,
-  pydantic,
   pytest-asyncio,
   pytestCheckHook,
-  pythonOlder,
-  requests,
   uvicorn,
+  attr,
 }:
 
 buildPythonPackage rec {
   pname = "langsmith";
-  version = "0.1.99";
+  version = "0.1.120";
   pyproject = true;
 
-  disabled = pythonOlder "3.8";
-
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langsmith-sdk";
     rev = "refs/tags/v${version}";
-    hash = "sha256-aN5HiQAXX7ZlVBzkit4DAw+7KQHI3ck1DLvBPDSKVhM=";
+    hash = "sha256-K8QIlyQnaTKCBoRCsTQ26KovIIw8uK6HBynEplrB6wI=";
   };
 
   sourceRoot = "${src.name}/python";
@@ -89,12 +92,12 @@ buildPythonPackage rec {
 
   __darwinAllowLocalNetworking = true;
 
-  meta = with lib; {
+  meta = {
     description = "Client library to connect to the LangSmith LLM Tracing and Evaluation Platform";
     homepage = "https://github.com/langchain-ai/langsmith-sdk";
     changelog = "https://github.com/langchain-ai/langsmith-sdk/releases/tag/v${version}";
-    license = licenses.mit;
-    maintainers = with maintainers; [ natsukium ];
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ natsukium ];
     mainProgram = "langsmith";
   };
 }