diff --git a/package-lock.json b/package-lock.json
index a72b5ca0..c58dbb28 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
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-  "version": "4.1.17",
+  "version": "4.2.1",
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   "requires": true,
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     "": {
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-      "version": "4.1.17",
+      "version": "4.2.1",
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@@ -37,7 +37,7 @@
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         "markdown-it": "^14.1.0",
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-      "license": "MIT",
-      "peer": true
+      "license": "MIT"
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@@ -236,7 +235,6 @@
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@@ -259,7 +257,6 @@
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+      "funding": [
+        "https://github.com/sponsors/broofa",
+        "https://github.com/sponsors/ctavan"
+      ],
+      "license": "MIT",
+      "bin": {
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+      }
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       "devOptional": true,
-      "license": "MIT",
-      "peer": true
+      "license": "MIT"
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@@ -6418,6 +6418,25 @@
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+      "resolved": "https://registry.npmjs.org/langchain/-/langchain-1.2.26.tgz",
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+      "dependencies": {
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+        "langsmith": ">=0.5.0 <1.0.0",
+        "uuid": "^10.0.0",
+        "zod": "^3.25.76 || ^4"
+      },
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+        "node": ">=20"
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@@ -8828,22 +8843,35 @@
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-        "uuid": "^10.0.0",
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       "engines": {
         "node": ">=20"
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       "peerDependencies": {
-        "@langchain/core": "^1.1.27"
+        "@langchain/core": "^1.1.35"
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+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-11.1.0.tgz",
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+      "funding": [
+        "https://github.com/sponsors/broofa",
+        "https://github.com/sponsors/ctavan"
+      ],
+      "license": "MIT",
+      "bin": {
+        "uuid": "dist/esm/bin/uuid"
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diff --git a/package.json b/package.json
index 219b1924..d8946415 100644
--- a/package.json
+++ b/package.json
@@ -1331,7 +1331,7 @@
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     "jsdom": "^26.0.0",
-    "langchain": "^1.0.4",
+    "langchain": "^1.2.36",
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     "markdown-it": "^14.1.0",