diff --git a/pkgs/development/python-modules/langchain-anthropic/default.nix b/pkgs/development/python-modules/langchain-anthropic/default.nix
index 8d67f225b81d..af748fb30dea 100644
--- a/pkgs/development/python-modules/langchain-anthropic/default.nix
+++ b/pkgs/development/python-modules/langchain-anthropic/default.nix
@@ -24,20 +24,23 @@
 
 buildPythonPackage (finalAttrs: {
   pname = "langchain-anthropic";
-  version = "1.4.0";
+  version = "1.4.2";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain";
     tag = "langchain-anthropic==${finalAttrs.version}";
-    hash = "sha256-nPVmyRvgGWDOANP0NalmX4obl+mMb/LdXtyO60k4zKs=";
+    hash = "sha256-V0unqMEfUTTNOxupBjStWD7JUCn1BQe25RIxSC/i4zI=";
   };
 
   sourceRoot = "${finalAttrs.src.name}/libs/partners/anthropic";
 
   build-system = [ hatchling ];
 
+  # Langchain always tracks the latest release of anthropic whether or not it's needed
+  pythonRelaxDeps = [ "anthropic" ];
+
   dependencies = [
     anthropic
     langchain-core
diff --git a/pkgs/development/python-modules/langchain-aws/default.nix b/pkgs/development/python-modules/langchain-aws/default.nix
index 0093d2ea8d3a..50b832ae2fbd 100644
--- a/pkgs/development/python-modules/langchain-aws/default.nix
+++ b/pkgs/development/python-modules/langchain-aws/default.nix
@@ -29,14 +29,14 @@
 
 buildPythonPackage (finalAttrs: {
   pname = "langchain-aws";
-  version = "1.4.4";
+  version = "1.4.5";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain-aws";
     tag = "langchain-aws==${finalAttrs.version}";
-    hash = "sha256-QXWODYzyQTVAAIHL4h2cgEqSBl4lBByoT1+DWMatYWE=";
+    hash = "sha256-ok8rCSzvjKR2Sr6XCdmULWyySkJ4Jdy3+LzKSOzUMlE=";
   };
 
   postPatch = ''
diff --git a/pkgs/development/python-modules/langchain-classic/default.nix b/pkgs/development/python-modules/langchain-classic/default.nix
index a61b7276651f..86c1fdf06a0f 100644
--- a/pkgs/development/python-modules/langchain-classic/default.nix
+++ b/pkgs/development/python-modules/langchain-classic/default.nix
@@ -42,14 +42,14 @@
 
 buildPythonPackage (finalAttrs: {
   pname = "langchain-classic";
-  version = "1.0.3";
+  version = "1.0.4";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain";
     tag = "langchain-classic==${finalAttrs.version}";
-    hash = "sha256-vCYdBBN9vU8gWedCxKXnzLzZ5C7pYl3KyECBNAQggto=";
+    hash = "sha256-yIu0P1GJBTEJ/Sq2ZTn7btoLiBgDCaNXJT9/W4maYtg=";
   };
 
   sourceRoot = "${finalAttrs.src.name}/libs/langchain";
diff --git a/pkgs/development/python-modules/langchain-core/default.nix b/pkgs/development/python-modules/langchain-core/default.nix
index ea0c885d06cb..440a2d193162 100644
--- a/pkgs/development/python-modules/langchain-core/default.nix
+++ b/pkgs/development/python-modules/langchain-core/default.nix
@@ -9,6 +9,7 @@
 
   # dependencies
   jsonpatch,
+  langchain-protocol,
   langsmith,
   packaging,
   pydantic,
@@ -36,14 +37,14 @@
 
 buildPythonPackage (finalAttrs: {
   pname = "langchain-core";
-  version = "1.2.27";
+  version = "1.3.2";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain";
     tag = "langchain-core==${finalAttrs.version}";
-    hash = "sha256-WdC43SUVgteNQLNMD+yEkD8TyyCFGXkYTi5moZMEmVo=";
+    hash = "sha256-7ugQnVnq/yW/7NVtqkAB1C3+XjLN3m+GQFKtv5uXw9E=";
   };
 
   sourceRoot = "${finalAttrs.src.name}/libs/core";
@@ -52,6 +53,7 @@ buildPythonPackage (finalAttrs: {
 
   dependencies = [
     jsonpatch
+    langchain-protocol
     langsmith
     packaging
     pydantic
diff --git a/pkgs/development/python-modules/langchain-fireworks/default.nix b/pkgs/development/python-modules/langchain-fireworks/default.nix
index 44324e662aef..5f1e26616207 100644
--- a/pkgs/development/python-modules/langchain-fireworks/default.nix
+++ b/pkgs/development/python-modules/langchain-fireworks/default.nix
@@ -24,14 +24,14 @@
 
 buildPythonPackage rec {
   pname = "langchain-fireworks";
-  version = "1.1.0";
+  version = "1.2.0";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain";
     tag = "langchain-fireworks==${version}";
-    hash = "sha256-gLc3pPxQZTm6PU5r1o7mxlnRI8tCeg/w9jkbbfUCSec=";
+    hash = "sha256-8qjF9QYtNneCijGYK8m40NZQIWxCeCLSN6S5jeWfyQE=";
   };
 
   sourceRoot = "${src.name}/libs/partners/fireworks";
diff --git a/pkgs/development/python-modules/langchain-google-genai/default.nix b/pkgs/development/python-modules/langchain-google-genai/default.nix
index c8f240af4b32..e257fe4473f6 100644
--- a/pkgs/development/python-modules/langchain-google-genai/default.nix
+++ b/pkgs/development/python-modules/langchain-google-genai/default.nix
@@ -29,14 +29,14 @@
 
 buildPythonPackage (finalAttrs: {
   pname = "langchain-google-genai";
-  version = "4.2.1";
+  version = "4.2.2";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain-google";
     tag = "libs/genai/v${finalAttrs.version}";
-    hash = "sha256-aNmYj5eOWDgHYlSLElwQXQByQg8gHqiybM19JQlkluk=";
+    hash = "sha256-W5JACbNUApJFz8XikKXGMY3XL1zdbaf+u9WmCQymy9M=";
   };
 
   sourceRoot = "${finalAttrs.src.name}/libs/genai";
diff --git a/pkgs/development/python-modules/langchain-huggingface/default.nix b/pkgs/development/python-modules/langchain-huggingface/default.nix
index 43d293c31605..be599bd0e104 100644
--- a/pkgs/development/python-modules/langchain-huggingface/default.nix
+++ b/pkgs/development/python-modules/langchain-huggingface/default.nix
@@ -33,14 +33,14 @@
 
 buildPythonPackage (finalAttrs: {
   pname = "langchain-huggingface";
-  version = "1.2.1";
+  version = "1.2.2";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain";
     tag = "langchain-huggingface==${finalAttrs.version}";
-    hash = "sha256-I6n7UNEbGqlyzT663k7+YpcaB/+rE9RlkqIToupoEyY=";
+    hash = "sha256-jMbFqui0XoKZ15B+5kJAamW5Dasv/JCIZS2KtteRBXg=";
   };
 
   sourceRoot = "${finalAttrs.src.name}/libs/partners/huggingface";
diff --git a/pkgs/development/python-modules/langchain-openai/default.nix b/pkgs/development/python-modules/langchain-openai/default.nix
index 82d4243f310b..4122a1d844c3 100644
--- a/pkgs/development/python-modules/langchain-openai/default.nix
+++ b/pkgs/development/python-modules/langchain-openai/default.nix
@@ -33,14 +33,14 @@
 
 buildPythonPackage (finalAttrs: {
   pname = "langchain-openai";
-  version = "1.1.12";
+  version = "1.2.0";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain";
     tag = "langchain-openai==${finalAttrs.version}";
-    hash = "sha256-lmEnkwX1tL88xHTrQRe96ZCvU5bM6iwzJ46exI+gfSI=";
+    hash = "sha256-EH4TZpo843m6/7oyFUxt4tkmCiCGD5+GFqM0gfgnWVQ=";
   };
 
   sourceRoot = "${finalAttrs.src.name}/libs/partners/openai";
diff --git a/pkgs/development/python-modules/langchain-protocol/default.nix b/pkgs/development/python-modules/langchain-protocol/default.nix
new file mode 100644
index 000000000000..491e71f7956b
--- /dev/null
+++ b/pkgs/development/python-modules/langchain-protocol/default.nix
@@ -0,0 +1,39 @@
+{
+  lib,
+  buildPythonPackage,
+  fetchPypi,
+  hatchling,
+  typing-extensions,
+}:
+
+buildPythonPackage (finalAttrs: {
+  pname = "langchain-protocol";
+  version = "0.0.12";
+  pyproject = true;
+
+  # Not available vis Github yet; required by langchain-core
+  src = fetchPypi {
+    pname = "langchain_protocol";
+    inherit (finalAttrs) version;
+    hash = "sha256-XhTENCkKcFyVEP2xqD7PdWGl5uDf0FOTCt6A26BpJp8=";
+  };
+
+  build-system = [
+    hatchling
+  ];
+
+  dependencies = [
+    typing-extensions
+  ];
+
+  pythonImportsCheck = [
+    "langchain_protocol"
+  ];
+
+  meta = {
+    description = "Python bindings for the LangChain agent streaming protocol";
+    homepage = "https://pypi.org/project/langchain-protocol";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ sarahec ];
+  };
+})
diff --git a/pkgs/development/python-modules/langchain-tests/default.nix b/pkgs/development/python-modules/langchain-tests/default.nix
index ebda1040f1f9..bf5ccf199958 100644
--- a/pkgs/development/python-modules/langchain-tests/default.nix
+++ b/pkgs/development/python-modules/langchain-tests/default.nix
@@ -28,14 +28,14 @@
 
 buildPythonPackage (finalAttrs: {
   pname = "langchain-tests";
-  version = "1.1.6";
+  version = "1.1.7";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain";
     tag = "langchain-tests==${finalAttrs.version}";
-    hash = "sha256-W+uJy0t6awNwMpMHEftHV8tDliEhvL/g8V2ZJPWeYk8=";
+    hash = "sha256-zesNbesiLMayvlVrU6NagmE2+o0l6ozwZlOGqvyGpnQ=";
   };
 
   sourceRoot = "${finalAttrs.src.name}/libs/standard-tests";
diff --git a/pkgs/development/python-modules/langchain-text-splitters/default.nix b/pkgs/development/python-modules/langchain-text-splitters/default.nix
index 437270e4ba75..90b04c0ef3ff 100644
--- a/pkgs/development/python-modules/langchain-text-splitters/default.nix
+++ b/pkgs/development/python-modules/langchain-text-splitters/default.nix
@@ -21,14 +21,14 @@
 
 buildPythonPackage (finalAttrs: {
   pname = "langchain-text-splitters";
-  version = "1.1.1";
+  version = "1.1.2";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langchain";
     tag = "langchain-text-splitters==${finalAttrs.version}";
-    hash = "sha256-I5eMc/E7sCxEQG8+jw3E/M4uB7adKU5IMHRsS6pacsA=";
+    hash = "sha256-AiRl8N2V2UfYLZfqxM8DHZmT76rH19I1gFyOYc/mpYY=";
   };
 
   sourceRoot = "${finalAttrs.src.name}/libs/text-splitters";
diff --git a/pkgs/development/python-modules/langgraph-checkpoint/default.nix b/pkgs/development/python-modules/langgraph-checkpoint/default.nix
index 0a2177b27e53..3f118a9947a8 100644
--- a/pkgs/development/python-modules/langgraph-checkpoint/default.nix
+++ b/pkgs/development/python-modules/langgraph-checkpoint/default.nix
@@ -27,14 +27,14 @@
 
 buildPythonPackage (finalAttrs: {
   pname = "langgraph-checkpoint";
-  version = "4.0.2";
+  version = "4.0.3";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langgraph";
     tag = "checkpoint==${finalAttrs.version}";
-    hash = "sha256-k0V+/kZlpMttgVId+mLgEMvK+l20NEmf8S1ylPWjjsU=";
+    hash = "sha256-zdl/WpzNLr3QmQqi2rvFl4dDzy0BRqMRv7I0GUp9Feg=";
   };
 
   sourceRoot = "${finalAttrs.src.name}/libs/checkpoint";
diff --git a/pkgs/development/python-modules/langgraph-prebuilt/default.nix b/pkgs/development/python-modules/langgraph-prebuilt/default.nix
index 8376a03386ce..e5740cc5d0b1 100644
--- a/pkgs/development/python-modules/langgraph-prebuilt/default.nix
+++ b/pkgs/development/python-modules/langgraph-prebuilt/default.nix
@@ -32,14 +32,14 @@
 # It exists so the langgraph team can iterate on it without having to rebuild langgraph.
 buildPythonPackage (finalAttrs: {
   pname = "langgraph-prebuilt";
-  version = "1.0.9";
+  version = "1.0.12";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langgraph";
     tag = "prebuilt==${finalAttrs.version}";
-    hash = "sha256-B9ntvj6qoKd63W/cPkevtfHbv8XUxmkaWupxURA8C68=";
+    hash = "sha256-J899GIBdXHjZVMwZlnn5GH52/TNjzLukc4Xp/qc8NOM=";
   };
 
   sourceRoot = "${finalAttrs.src.name}/libs/prebuilt";
diff --git a/pkgs/development/python-modules/langgraph-runtime-inmem/default.nix b/pkgs/development/python-modules/langgraph-runtime-inmem/default.nix
index de025a39eba3..40082663db52 100644
--- a/pkgs/development/python-modules/langgraph-runtime-inmem/default.nix
+++ b/pkgs/development/python-modules/langgraph-runtime-inmem/default.nix
@@ -14,14 +14,14 @@
 
 buildPythonPackage (finalAttrs: {
   pname = "langgraph-runtime-inmem";
-  version = "0.27.3";
+  version = "0.28.0";
   pyproject = true;
 
   # Not available in any repository
   src = fetchPypi {
     pname = "langgraph_runtime_inmem";
     inherit (finalAttrs) version;
-    hash = "sha256-jylX7GXEJFJr5pBxCnD2W/kG3dkqS9IFS7VhyPlErJE=";
+    hash = "sha256-4CU2UItcFU8YokJAZjr3wjifQ8tPu6yZWicXtM/kDS8=";
   };
 
   build-system = [ hatchling ];
diff --git a/pkgs/development/python-modules/langgraph/default.nix b/pkgs/development/python-modules/langgraph/default.nix
index 01200d17308b..3512b1f6d896 100644
--- a/pkgs/development/python-modules/langgraph/default.nix
+++ b/pkgs/development/python-modules/langgraph/default.nix
@@ -41,14 +41,14 @@
 }:
 buildPythonPackage (finalAttrs: {
   pname = "langgraph";
-  version = "1.1.6";
+  version = "1.1.10";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "langchain-ai";
     repo = "langgraph";
     tag = finalAttrs.version;
-    hash = "sha256-9YuvzPmyNOfx8AolUaY8XFeYUpWRmudtLEAUadRUAqY=";
+    hash = "sha256-J899GIBdXHjZVMwZlnn5GH52/TNjzLukc4Xp/qc8NOM=";
   };
 
   postgresqlTestSetupPost = ''
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 52543ba19182..e8558e3a9521 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -8498,6 +8498,8 @@ self: super: with self; {
 
   langchain-perplexity = callPackage ../development/python-modules/langchain-perplexity { };
 
+  langchain-protocol = callPackage ../development/python-modules/langchain-protocol { };
+
   langchain-tests = callPackage ../development/python-modules/langchain-tests { };
 
   langchain-text-splitters = callPackage ../development/python-modules/langchain-text-splitters { };