diff --git a/dependency_range_tests/docker-compose.yml b/dependency_range_tests/docker-compose.yml
index 3305a85d20a2f..579707fbe1ad2 100644
--- a/dependency_range_tests/docker-compose.yml
+++ b/dependency_range_tests/docker-compose.yml
@@ -2,7 +2,7 @@ version: "3"
 services:
   # LangChain
   langchain-latest-deps:
-    image: node:18
+    image: node:20
     environment:
       PUPPETEER_SKIP_DOWNLOAD: "true"
       PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: "true"
@@ -13,7 +13,7 @@ services:
       - ./scripts:/scripts
     command: bash /scripts/langchain/test-with-latest-deps.sh
   langchain-lowest-deps:
-    image: node:18
+    image: node:20
     environment:
       PUPPETEER_SKIP_DOWNLOAD: "true"
       PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: "true"
@@ -23,10 +23,10 @@ services:
       - ../langchain:/langchain
       - ./scripts:/scripts
     command: bash /scripts/langchain/test-with-lowest-deps.sh
-  
+
   # Community
   community-latest-deps:
-    image: node:18
+    image: node:20
     environment:
       PUPPETEER_SKIP_DOWNLOAD: "true"
       PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: "true"
@@ -34,13 +34,13 @@ services:
     working_dir: /app
     volumes:
       - ../turbo.json:/turbo.json
-      - ../package.json:/package.json
+      - ./scripts/with_standard_tests/community/node/package.json:/package.json
       - ../libs/langchain-standard-tests:/libs/langchain-standard-tests
       - ../libs/langchain-community:/libs/langchain-community
       - ./scripts:/scripts
     command: bash /scripts/with_standard_tests/community/test-with-latest-deps.sh
   community-lowest-deps:
-    image: node:18
+    image: node:20
     environment:
       PUPPETEER_SKIP_DOWNLOAD: "true"
       PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: "true"
@@ -48,20 +48,20 @@ services:
     working_dir: /app
     volumes:
       - ../turbo.json:/turbo.json
-      - ../package.json:/package.json
+      - ./scripts/with_standard_tests/community/node/package.json:/package.json
       - ../libs/langchain-standard-tests:/libs/langchain-standard-tests
       - ../libs/langchain-community:/libs/langchain-community
       - ./scripts:/scripts
     command: bash /scripts/with_standard_tests/community/test-with-lowest-deps.sh
   community-npm-install:
-    image: node:18
+    image: node:20
     environment:
       PUPPETEER_SKIP_DOWNLOAD: "true"
       PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: "true"
     working_dir: /app
     volumes:
       - ../turbo.json:/turbo.json
-      - ../package.json:/package.json
+      - ./scripts/with_standard_tests/community/node/package.json:/package.json
       - ../libs/langchain-standard-tests:/libs/langchain-standard-tests
       - ../libs/langchain-community:/libs/langchain-community
       - ./scripts:/scripts
@@ -69,7 +69,7 @@ services:
 
   # OpenAI
   openai-latest-deps:
-    image: node:18
+    image: node:20
     environment:
       PUPPETEER_SKIP_DOWNLOAD: "true"
       PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: "true"
@@ -77,13 +77,13 @@ services:
     working_dir: /app
     volumes:
       - ../turbo.json:/turbo.json
-      - ../package.json:/package.json
+      - ./scripts/with_standard_tests/openai/node/package.json:/package.json
       - ../libs/langchain-standard-tests:/libs/langchain-standard-tests
       - ../libs/langchain-openai:/libs/langchain-openai
       - ./scripts:/scripts
     command: bash /scripts/with_standard_tests/openai/test-with-latest-deps.sh
   openai-lowest-deps:
-    image: node:18
+    image: node:20
     environment:
       PUPPETEER_SKIP_DOWNLOAD: "true"
       PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: "true"
@@ -91,7 +91,7 @@ services:
     working_dir: /app
     volumes:
       - ../turbo.json:/turbo.json
-      - ../package.json:/package.json
+      - ./scripts/with_standard_tests/openai/node/package.json:/package.json
       - ../libs/langchain-standard-tests:/libs/langchain-standard-tests
       - ../libs/langchain-openai:/libs/langchain-openai
       - ./scripts:/scripts
@@ -99,7 +99,7 @@ services:
 
   # Anthropic
   anthropic-latest-deps:
-    image: node:18
+    image: node:20
     environment:
       PUPPETEER_SKIP_DOWNLOAD: "true"
       PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: "true"
@@ -107,13 +107,13 @@ services:
     working_dir: /app
     volumes:
       - ../turbo.json:/turbo.json
-      - ../package.json:/package.json
+      - ./scripts/with_standard_tests/anthropic/node/package.json:/package.json
       - ../libs/langchain-standard-tests:/libs/langchain-standard-tests
       - ../libs/langchain-anthropic:/libs/langchain-anthropic
       - ./scripts:/scripts
     command: bash /scripts/with_standard_tests/anthropic/test-with-latest-deps.sh
   anthropic-lowest-deps:
-    image: node:18
+    image: node:20
     environment:
       PUPPETEER_SKIP_DOWNLOAD: "true"
       PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: "true"
@@ -121,7 +121,7 @@ services:
     working_dir: /app
     volumes:
       - ../turbo.json:/turbo.json
-      - ../package.json:/package.json
+      - ./scripts/with_standard_tests/anthropic/node/package.json:/package.json
       - ../libs/langchain-standard-tests:/libs/langchain-standard-tests
       - ../libs/langchain-anthropic:/libs/langchain-anthropic
       - ./scripts:/scripts
@@ -129,7 +129,7 @@ services:
 
   # Google VertexAI
   google-vertexai-latest-deps:
-    image: node:18
+    image: node:20
     environment:
       PUPPETEER_SKIP_DOWNLOAD: "true"
       PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: "true"
@@ -137,13 +137,13 @@ services:
     working_dir: /app
     volumes:
       - ../turbo.json:/turbo.json
-      - ../package.json:/package.json
+      - ./scripts/with_standard_tests/google-vertexai/node/package.json:/package.json
       - ../libs/langchain-standard-tests:/libs/langchain-standard-tests
       - ../libs/langchain-google-vertexai:/libs/langchain-google-vertexai
       - ./scripts:/scripts
     command: bash /scripts/with_standard_tests/google-vertexai/test-with-latest-deps.sh
   google-vertexai-lowest-deps:
-    image: node:18
+    image: node:20
     environment:
       PUPPETEER_SKIP_DOWNLOAD: "true"
       PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: "true"
@@ -151,7 +151,7 @@ services:
     working_dir: /app
     volumes:
       - ../turbo.json:/turbo.json
-      - ../package.json:/package.json
+      - ./scripts/with_standard_tests/google-vertexai/node/package.json:/package.json
       - ../libs/langchain-standard-tests:/libs/langchain-standard-tests
       - ../libs/langchain-google-vertexai:/libs/langchain-google-vertexai
       - ./scripts:/scripts
@@ -159,7 +159,7 @@ services:
 
   # Cohere
   cohere-latest-deps:
-    image: node:18
+    image: node:20
     environment:
       PUPPETEER_SKIP_DOWNLOAD: "true"
       PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: "true"
@@ -167,13 +167,13 @@ services:
     working_dir: /app
     volumes:
       - ../turbo.json:/turbo.json
-      - ../package.json:/package.json
+      - ./scripts/with_standard_tests/cohere/node/package.json:/package.json
       - ../libs/langchain-standard-tests:/libs/langchain-standard-tests
       - ../libs/langchain-cohere:/libs/langchain-cohere
       - ./scripts:/scripts
     command: bash /scripts/with_standard_tests/cohere/test-with-latest-deps.sh
   cohere-lowest-deps:
-    image: node:18
+    image: node:20
     environment:
       PUPPETEER_SKIP_DOWNLOAD: "true"
       PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: "true"
@@ -181,8 +181,8 @@ services:
     working_dir: /app
     volumes:
       - ../turbo.json:/turbo.json
-      - ../package.json:/package.json
+      - ./scripts/with_standard_tests/cohere/node/package.json:/package.json
       - ../libs/langchain-standard-tests:/libs/langchain-standard-tests
       - ../libs/langchain-cohere:/libs/langchain-cohere
       - ./scripts:/scripts
-    command: bash /scripts/with_standard_tests/cohere/test-with-lowest-deps.sh
\ No newline at end of file
+    command: bash /scripts/with_standard_tests/cohere/test-with-lowest-deps.sh
diff --git a/dependency_range_tests/scripts/with_standard_tests/anthropic/node/package.json b/dependency_range_tests/scripts/with_standard_tests/anthropic/node/package.json
index a4622fc745976..472405f4ca222 100644
--- a/dependency_range_tests/scripts/with_standard_tests/anthropic/node/package.json
+++ b/dependency_range_tests/scripts/with_standard_tests/anthropic/node/package.json
@@ -2,8 +2,11 @@
   "name": "dependency-range-tests",
   "version": "0.0.0",
   "private": true,
+  "workspaces": [
+    "libs/*"
+  ],
   "description": "Tests dependency ranges for LangChain.",
   "dependencies": {
     "semver": "^7.5.4"
   }
-}
\ No newline at end of file
+}
diff --git a/dependency_range_tests/scripts/with_standard_tests/anthropic/test-with-latest-deps.sh b/dependency_range_tests/scripts/with_standard_tests/anthropic/test-with-latest-deps.sh
index bcf32dfbaa9a1..46b76fba9993f 100644
--- a/dependency_range_tests/scripts/with_standard_tests/anthropic/test-with-latest-deps.sh
+++ b/dependency_range_tests/scripts/with_standard_tests/anthropic/test-with-latest-deps.sh
@@ -27,6 +27,7 @@ node "update_resolutions_latest.js"
 
 # Navigate back to monorepo root and install dependencies
 cd "$monorepo_dir"
+touch yarn.lock
 yarn
 
 # Navigate into `@langchain/anthropic` to build and run tests
diff --git a/dependency_range_tests/scripts/with_standard_tests/anthropic/test-with-lowest-deps.sh b/dependency_range_tests/scripts/with_standard_tests/anthropic/test-with-lowest-deps.sh
index 11eae9e21a806..d8b109b41db3f 100644
--- a/dependency_range_tests/scripts/with_standard_tests/anthropic/test-with-lowest-deps.sh
+++ b/dependency_range_tests/scripts/with_standard_tests/anthropic/test-with-lowest-deps.sh
@@ -25,6 +25,7 @@ node "update_resolutions_lowest.js"
 
 # Navigate back to monorepo root and install dependencies
 cd "$monorepo_dir"
+touch yarn.lock
 yarn
 
 # Navigate into `@langchain/anthropic` to build and run tests
diff --git a/dependency_range_tests/scripts/with_standard_tests/cohere/node/package.json b/dependency_range_tests/scripts/with_standard_tests/cohere/node/package.json
index a4622fc745976..472405f4ca222 100644
--- a/dependency_range_tests/scripts/with_standard_tests/cohere/node/package.json
+++ b/dependency_range_tests/scripts/with_standard_tests/cohere/node/package.json
@@ -2,8 +2,11 @@
   "name": "dependency-range-tests",
   "version": "0.0.0",
   "private": true,
+  "workspaces": [
+    "libs/*"
+  ],
   "description": "Tests dependency ranges for LangChain.",
   "dependencies": {
     "semver": "^7.5.4"
   }
-}
\ No newline at end of file
+}
diff --git a/dependency_range_tests/scripts/with_standard_tests/cohere/test-with-latest-deps.sh b/dependency_range_tests/scripts/with_standard_tests/cohere/test-with-latest-deps.sh
index 24c5ccc872f81..afb78b0bdcd8d 100644
--- a/dependency_range_tests/scripts/with_standard_tests/cohere/test-with-latest-deps.sh
+++ b/dependency_range_tests/scripts/with_standard_tests/cohere/test-with-latest-deps.sh
@@ -26,6 +26,7 @@ node "update_resolutions_latest.js"
 
 # Navigate back to monorepo root and install dependencies
 cd "$monorepo_dir"
+touch yarn.lock
 yarn
 
 # Navigate into `@langchain/cohere` to build and run tests
diff --git a/dependency_range_tests/scripts/with_standard_tests/cohere/test-with-lowest-deps.sh b/dependency_range_tests/scripts/with_standard_tests/cohere/test-with-lowest-deps.sh
index 3868e0a9d6c03..7411c49e564cf 100644
--- a/dependency_range_tests/scripts/with_standard_tests/cohere/test-with-lowest-deps.sh
+++ b/dependency_range_tests/scripts/with_standard_tests/cohere/test-with-lowest-deps.sh
@@ -26,6 +26,7 @@ node "update_resolutions_lowest.js"
 
 # Navigate back to monorepo root and install dependencies
 cd "$monorepo_dir"
+touch yarn.lock
 yarn
 
 # Navigate into `@langchain/cohere` to build and run tests
diff --git a/dependency_range_tests/scripts/with_standard_tests/community/node/package.json b/dependency_range_tests/scripts/with_standard_tests/community/node/package.json
index a4622fc745976..472405f4ca222 100644
--- a/dependency_range_tests/scripts/with_standard_tests/community/node/package.json
+++ b/dependency_range_tests/scripts/with_standard_tests/community/node/package.json
@@ -2,8 +2,11 @@
   "name": "dependency-range-tests",
   "version": "0.0.0",
   "private": true,
+  "workspaces": [
+    "libs/*"
+  ],
   "description": "Tests dependency ranges for LangChain.",
   "dependencies": {
     "semver": "^7.5.4"
   }
-}
\ No newline at end of file
+}
diff --git a/dependency_range_tests/scripts/with_standard_tests/community/test-with-latest-deps.sh b/dependency_range_tests/scripts/with_standard_tests/community/test-with-latest-deps.sh
index df63a38f85465..5e5d5c893316c 100644
--- a/dependency_range_tests/scripts/with_standard_tests/community/test-with-latest-deps.sh
+++ b/dependency_range_tests/scripts/with_standard_tests/community/test-with-latest-deps.sh
@@ -26,6 +26,7 @@ node "update_resolutions_latest.js"
 
 # Navigate back to monorepo root and install dependencies
 cd "$monorepo_dir"
+touch yarn.lock
 yarn
 
 # Navigate into `@langchain/community` to build and run tests
diff --git a/dependency_range_tests/scripts/with_standard_tests/community/test-with-lowest-deps.sh b/dependency_range_tests/scripts/with_standard_tests/community/test-with-lowest-deps.sh
index e6d70012a8096..5575f53b0b5cd 100644
--- a/dependency_range_tests/scripts/with_standard_tests/community/test-with-lowest-deps.sh
+++ b/dependency_range_tests/scripts/with_standard_tests/community/test-with-lowest-deps.sh
@@ -26,6 +26,7 @@ node "update_resolutions_lowest.js"
 
 # Navigate back to monorepo root and install dependencies
 cd "$monorepo_dir"
+touch yarn.lock
 yarn
 
 # Navigate into `@langchain/package` to build and run tests
diff --git a/dependency_range_tests/scripts/with_standard_tests/google-vertexai/node/package.json b/dependency_range_tests/scripts/with_standard_tests/google-vertexai/node/package.json
index a4622fc745976..268de13087d84 100644
--- a/dependency_range_tests/scripts/with_standard_tests/google-vertexai/node/package.json
+++ b/dependency_range_tests/scripts/with_standard_tests/google-vertexai/node/package.json
@@ -2,8 +2,12 @@
   "name": "dependency-range-tests",
   "version": "0.0.0",
   "private": true,
+  "workspaces": [
+    "libs/*"
+  ],
   "description": "Tests dependency ranges for LangChain.",
   "dependencies": {
     "semver": "^7.5.4"
-  }
-}
\ No newline at end of file
+  },
+  "packageManager": "yarn@1.22.22+sha512.a6b2f7906b721bba3d67d4aff083df04dad64c399707841b7acf00f6b133b7ac24255f2652fa22ae3534329dc6180534e98d17432037ff6fd140556e2bb3137e"
+}
diff --git a/dependency_range_tests/scripts/with_standard_tests/google-vertexai/test-with-latest-deps.sh b/dependency_range_tests/scripts/with_standard_tests/google-vertexai/test-with-latest-deps.sh
index 567366beb19e5..00d5cb3e983b7 100644
--- a/dependency_range_tests/scripts/with_standard_tests/google-vertexai/test-with-latest-deps.sh
+++ b/dependency_range_tests/scripts/with_standard_tests/google-vertexai/test-with-latest-deps.sh
@@ -26,6 +26,8 @@ node "update_resolutions_latest.js"
 
 # Navigate back to monorepo root and install dependencies
 cd "$monorepo_dir"
+touch yarn.lock
+cat ./package.json
 yarn
 
 # Navigate into `@langchain/google-vertexai` to build and run tests
diff --git a/dependency_range_tests/scripts/with_standard_tests/google-vertexai/test-with-lowest-deps.sh b/dependency_range_tests/scripts/with_standard_tests/google-vertexai/test-with-lowest-deps.sh
index 23dcf3ba0d823..d04849a08c7f8 100644
--- a/dependency_range_tests/scripts/with_standard_tests/google-vertexai/test-with-lowest-deps.sh
+++ b/dependency_range_tests/scripts/with_standard_tests/google-vertexai/test-with-lowest-deps.sh
@@ -26,6 +26,7 @@ node "update_resolutions_lowest.js"
 
 # Navigate back to monorepo root and install dependencies
 cd "$monorepo_dir"
+touch yarn.lock
 yarn
 
 # Navigate into `@langchain/package` to build and run tests
diff --git a/dependency_range_tests/scripts/with_standard_tests/node/package.json b/dependency_range_tests/scripts/with_standard_tests/node/package.json
index ba8b482e75150..3b53ce354167f 100644
--- a/dependency_range_tests/scripts/with_standard_tests/node/package.json
+++ b/dependency_range_tests/scripts/with_standard_tests/node/package.json
@@ -2,6 +2,9 @@
   "name": "dependency-range-tests",
   "version": "0.0.0",
   "private": true,
+  "workspaces": [
+    "libs/*"
+  ],
   "description": "Tests dependency ranges for LangChain.",
   "dependencies": {}
-}
\ No newline at end of file
+}
diff --git a/dependency_range_tests/scripts/with_standard_tests/openai/node/package.json b/dependency_range_tests/scripts/with_standard_tests/openai/node/package.json
index a4622fc745976..472405f4ca222 100644
--- a/dependency_range_tests/scripts/with_standard_tests/openai/node/package.json
+++ b/dependency_range_tests/scripts/with_standard_tests/openai/node/package.json
@@ -2,8 +2,11 @@
   "name": "dependency-range-tests",
   "version": "0.0.0",
   "private": true,
+  "workspaces": [
+    "libs/*"
+  ],
   "description": "Tests dependency ranges for LangChain.",
   "dependencies": {
     "semver": "^7.5.4"
   }
-}
\ No newline at end of file
+}
diff --git a/dependency_range_tests/scripts/with_standard_tests/openai/test-with-latest-deps.sh b/dependency_range_tests/scripts/with_standard_tests/openai/test-with-latest-deps.sh
index 2080ec7864679..7c399d0fb223d 100644
--- a/dependency_range_tests/scripts/with_standard_tests/openai/test-with-latest-deps.sh
+++ b/dependency_range_tests/scripts/with_standard_tests/openai/test-with-latest-deps.sh
@@ -26,6 +26,7 @@ node "update_resolutions_latest.js"
 
 # Navigate back to monorepo root and install dependencies
 cd "$monorepo_dir"
+touch yarn.lock
 yarn
 
 # Navigate into `@langchain/openai` to build and run tests
diff --git a/dependency_range_tests/scripts/with_standard_tests/openai/test-with-lowest-deps.sh b/dependency_range_tests/scripts/with_standard_tests/openai/test-with-lowest-deps.sh
index 6f47d13e8aa1c..a462b8d20c12d 100644
--- a/dependency_range_tests/scripts/with_standard_tests/openai/test-with-lowest-deps.sh
+++ b/dependency_range_tests/scripts/with_standard_tests/openai/test-with-lowest-deps.sh
@@ -26,6 +26,7 @@ node "update_resolutions_lowest.js"
 
 # Navigate back to monorepo root and install dependencies
 cd "$monorepo_dir"
+touch yarn.lock
 yarn
 
 # Navigate into `@langchain/package` to build and run tests
diff --git a/examples/package.json b/examples/package.json
index 792c866804fb5..177aa64333177 100644
--- a/examples/package.json
+++ b/examples/package.json
@@ -93,7 +93,7 @@
     "ioredis": "^5.3.2",
     "js-yaml": "^4.1.0",
     "langchain": "workspace:*",
-    "langsmith": "^0.2.0",
+    "langsmith": "^0.2.8",
     "mongodb": "^6.3.0",
     "pg": "^8.11.0",
     "pickleparser": "^0.2.1",
diff --git a/langchain-core/package.json b/langchain-core/package.json
index 981581f4d5744..23ad4669014b0 100644
--- a/langchain-core/package.json
+++ b/langchain-core/package.json
@@ -38,7 +38,7 @@
     "camelcase": "6",
     "decamelize": "1.2.0",
     "js-tiktoken": "^1.0.12",
-    "langsmith": "^0.2.0",
+    "langsmith": "^0.2.8",
     "mustache": "^4.2.0",
     "p-queue": "^6.6.2",
     "p-retry": "4",
diff --git a/langchain-core/src/singletons/tracer.ts b/langchain-core/src/singletons/tracer.ts
index 89696240705dc..1a51a43aac918 100644
--- a/langchain-core/src/singletons/tracer.ts
+++ b/langchain-core/src/singletons/tracer.ts
@@ -16,3 +16,7 @@ export const getDefaultLangChainClientSingleton = () => {
   }
   return client;
 };
+
+export const setDefaultLangChainClientSingleton = (newClient: Client) => {
+  client = newClient;
+};
diff --git a/langchain-core/src/tracers/tests/langsmith_interop.test.ts b/langchain-core/src/tracers/tests/langsmith_interop.test.ts
index 11d654fca1292..48429e1d5f09b 100644
--- a/langchain-core/src/tracers/tests/langsmith_interop.test.ts
+++ b/langchain-core/src/tracers/tests/langsmith_interop.test.ts
@@ -11,14 +11,20 @@ import {
   expect,
 } from "@jest/globals";
 import { traceable } from "langsmith/traceable";
+import { Client } from "langsmith";
 
 import { RunnableLambda } from "../../runnables/base.js";
 import { BaseMessage, HumanMessage } from "../../messages/index.js";
+import { setDefaultLangChainClientSingleton } from "../../singletons/tracer.js";
 
 let fetchMock: any;
 
 const originalTracingEnvValue = process.env.LANGCHAIN_TRACING_V2;
 
+const client = new Client({
+  autoBatchTracing: false,
+});
+
 beforeEach(() => {
   fetchMock = jest.spyOn(global, "fetch").mockImplementation(() =>
     Promise.resolve({
@@ -29,6 +35,7 @@ beforeEach(() => {
       },
     } as any)
   );
+  setDefaultLangChainClientSingleton(client);
   process.env.LANGCHAIN_TRACING_V2 = "true";
 });
 
@@ -50,7 +57,7 @@ test.each(["true", "false"])(
         await new Promise((resolve) => setTimeout(resolve, 300));
         return msg.content + name;
       },
-      { name: "aiGreet", tracingEnabled: true }
+      { name: "aiGreet", tracingEnabled: true, client }
     );
 
     const root = RunnableLambda.from(async (messages: BaseMessage[]) => {
@@ -197,7 +204,7 @@ test.each(["true", "false"])(
         expect(getContextVariable("foo")).toEqual("baz");
         return msg.content + name;
       },
-      { name: "aiGreet", tracingEnabled: true }
+      { name: "aiGreet", tracingEnabled: true, client }
     );
 
     const root = RunnableLambda.from(async (messages: BaseMessage[]) => {
@@ -485,7 +492,7 @@ test.each(["true", "false"])(
         const contents = await nested.invoke([msg]);
         return contents[0] + name;
       },
-      { name: "aiGreet", tracingEnabled: true }
+      { name: "aiGreet", tracingEnabled: true, client }
     );
 
     await aiGreet(new HumanMessage({ content: "Hello!" }), "mitochondria");
@@ -632,7 +639,7 @@ test.each(["true", "false"])(
         expect(getContextVariable("foo")).toEqual("bar");
         return contents[0] + name;
       },
-      { name: "aiGreet", tracingEnabled: true }
+      { name: "aiGreet", tracingEnabled: true, client }
     );
 
     await aiGreet(new HumanMessage({ content: "Hello!" }), "mitochondria");
@@ -781,7 +788,7 @@ test.each(["true", "false"])(
           yield letter;
         }
       },
-      { name: "aiGreet", tracingEnabled: true }
+      { name: "aiGreet", tracingEnabled: true, client }
     );
 
     for await (const _ of aiGreet(
diff --git a/langchain-core/src/tracers/tracer_langchain.ts b/langchain-core/src/tracers/tracer_langchain.ts
index e5719125df510..8a58a8e8b1194 100644
--- a/langchain-core/src/tracers/tracer_langchain.ts
+++ b/langchain-core/src/tracers/tracer_langchain.ts
@@ -1,4 +1,4 @@
-import { Client } from "langsmith";
+import type { Client, LangSmithTracingClientInterface } from "langsmith";
 import { RunTree } from "langsmith/run_trees";
 import { getCurrentRunTree } from "langsmith/singletons/traceable";
 
@@ -36,7 +36,7 @@ export interface RunUpdate extends BaseRunUpdate {
 export interface LangChainTracerFields extends BaseCallbackHandlerInput {
   exampleId?: string;
   projectName?: string;
-  client?: Client;
+  client?: LangSmithTracingClientInterface;
 }
 
 export class LangChainTracer
@@ -49,7 +49,7 @@ export class LangChainTracer
 
   exampleId?: string;
 
-  client: Client;
+  client: LangSmithTracingClientInterface;
 
   constructor(fields: LangChainTracerFields = {}) {
     super(fields);
@@ -156,7 +156,7 @@ export class LangChainTracer
         parent_run: undefined,
 
         // inherited properties
-        client: this.client,
+        client: this.client as Client,
         project_name: this.projectName,
         reference_example_id: this.exampleId,
         tracingEnabled: true,
diff --git a/langchain/package.json b/langchain/package.json
index 24c44241b0f51..9a31b79868dfe 100644
--- a/langchain/package.json
+++ b/langchain/package.json
@@ -520,7 +520,7 @@
     "js-tiktoken": "^1.0.12",
     "js-yaml": "^4.1.0",
     "jsonpointer": "^5.0.1",
-    "langsmith": "^0.2.0",
+    "langsmith": "^0.2.8",
     "openapi-types": "^12.1.3",
     "p-retry": "4",
     "uuid": "^10.0.0",
diff --git a/libs/langchain-community/package.json b/libs/langchain-community/package.json
index 7b826ad1e106b..e9cf7a69c8820 100644
--- a/libs/langchain-community/package.json
+++ b/libs/langchain-community/package.json
@@ -41,7 +41,7 @@
     "flat": "^5.0.2",
     "js-yaml": "^4.1.0",
     "langchain": ">=0.2.3 <0.3.0 || >=0.3.4 <0.4.0",
-    "langsmith": "^0.2.0",
+    "langsmith": "^0.2.8",
     "uuid": "^10.0.0",
     "zod": "^3.22.3",
     "zod-to-json-schema": "^3.22.5"
diff --git a/yarn.lock b/yarn.lock
index 63448a279f348..1ab5c37faa011 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -11836,7 +11836,7 @@ __metadata:
     jsdom: ^22.1.0
     jsonwebtoken: ^9.0.2
     langchain: ">=0.2.3 <0.3.0 || >=0.3.4 <0.4.0"
-    langsmith: ^0.2.0
+    langsmith: ^0.2.8
     llmonitor: ^0.5.9
     lodash: ^4.17.21
     lunary: ^0.7.10
@@ -12271,7 +12271,7 @@ __metadata:
     jest: ^29.5.0
     jest-environment-node: ^29.6.4
     js-tiktoken: ^1.0.12
-    langsmith: ^0.2.0
+    langsmith: ^0.2.8
     ml-matrix: ^6.10.4
     mustache: ^4.2.0
     p-queue: ^6.6.2
@@ -27683,7 +27683,7 @@ __metadata:
     ioredis: ^5.3.2
     js-yaml: ^4.1.0
     langchain: "workspace:*"
-    langsmith: ^0.2.0
+    langsmith: ^0.2.8
     mongodb: ^6.3.0
     pg: ^8.11.0
     pickleparser: ^0.2.1
@@ -33337,7 +33337,7 @@ __metadata:
     js-tiktoken: ^1.0.12
     js-yaml: ^4.1.0
     jsonpointer: ^5.0.1
-    langsmith: ^0.2.0
+    langsmith: ^0.2.8
     openai: ^4.41.1
     openapi-types: ^12.1.3
     p-retry: 4
@@ -33416,9 +33416,9 @@ __metadata:
   languageName: unknown
   linkType: soft
 
-"langsmith@npm:^0.2.0":
-  version: 0.2.0
-  resolution: "langsmith@npm:0.2.0"
+"langsmith@npm:^0.2.8":
+  version: 0.2.8
+  resolution: "langsmith@npm:0.2.8"
   dependencies:
     "@types/uuid": ^10.0.0
     commander: ^10.0.1
@@ -33431,7 +33431,7 @@ __metadata:
   peerDependenciesMeta:
     openai:
       optional: true
-  checksum: 0cd92d0e31526d309af197a3502c93a00ac8c09f6b2864161a18a5c1e8b95b0e8203bad2dfe3b4beb26055fc815a8d70730592a58c9af7e202917b13d01f695c
+  checksum: 8695df08a09b9885b0308c66fbf9802edbe20e286fec3db8faa75ed1893a7aafae014441e311677bb60abb33af49da7f7d8404f55fffbdad5aec61cf65215fc8
   languageName: node
   linkType: hard