diff --git a/.changeset/giant-games-count.md b/.changeset/giant-games-count.md
new file mode 100644
index 000000000..775835dae
--- /dev/null
+++ b/.changeset/giant-games-count.md
@@ -0,0 +1,6 @@
+---
+'@web/test-runner-core': patch
+'@web/dev-server-core': patch
+---
+
+bump chokidar to v4
diff --git a/package-lock.json b/package-lock.json
index c5918fa6c..f2afab98e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -34616,7 +34616,7 @@
         "@types/koa": "^2.11.6",
         "@types/ws": "^7.4.0",
         "@web/parse5-utils": "^2.1.0",
-        "chokidar": "^3.4.3",
+        "chokidar": "^4.0.1",
         "clone": "^2.1.2",
         "es-module-lexer": "^1.0.0",
         "get-stream": "^6.0.0",
@@ -34646,6 +34646,34 @@
         "node": ">=18.0.0"
       }
     },
+    "packages/dev-server-core/node_modules/chokidar": {
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-4.0.1.tgz",
+      "integrity": "sha512-n8enUVCED/KVRQlab1hr3MVpcVMvxtZjmEa956u+4YijlmQED223XMSYj2tLuKvr4jcCTzNNMpQDUer72MMmzA==",
+      "license": "MIT",
+      "dependencies": {
+        "readdirp": "^4.0.1"
+      },
+      "engines": {
+        "node": ">= 14.16.0"
+      },
+      "funding": {
+        "url": "https://paulmillr.com/funding/"
+      }
+    },
+    "packages/dev-server-core/node_modules/readdirp": {
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/readdirp/-/readdirp-4.0.1.tgz",
+      "integrity": "sha512-GkMg9uOTpIWWKbSsgwb5fA4EavTR+SG/PMPoAY8hkhHfEEY0/vqljY+XHqtDf2cr2IJtoNRDbrrEpZUiZCkYRw==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 14.16.0"
+      },
+      "funding": {
+        "type": "individual",
+        "url": "https://paulmillr.com/funding/"
+      }
+    },
     "packages/dev-server-esbuild": {
       "name": "@web/dev-server-esbuild",
       "version": "1.0.2",
@@ -37530,7 +37558,7 @@
         "@types/istanbul-reports": "^3.0.0",
         "@web/browser-logs": "^0.4.0",
         "@web/dev-server-core": "^0.7.2",
-        "chokidar": "^3.4.3",
+        "chokidar": "^4.0.1",
         "cli-cursor": "^3.1.0",
         "co-body": "^6.1.0",
         "convert-source-map": "^2.0.0",
@@ -37555,6 +37583,21 @@
         "node": ">=18.0.0"
       }
     },
+    "packages/test-runner-core/node_modules/chokidar": {
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-4.0.1.tgz",
+      "integrity": "sha512-n8enUVCED/KVRQlab1hr3MVpcVMvxtZjmEa956u+4YijlmQED223XMSYj2tLuKvr4jcCTzNNMpQDUer72MMmzA==",
+      "license": "MIT",
+      "dependencies": {
+        "readdirp": "^4.0.1"
+      },
+      "engines": {
+        "node": ">= 14.16.0"
+      },
+      "funding": {
+        "url": "https://paulmillr.com/funding/"
+      }
+    },
     "packages/test-runner-core/node_modules/dependency-graph": {
       "version": "0.11.0",
       "resolved": "https://registry.npmjs.org/dependency-graph/-/dependency-graph-0.11.0.tgz",
@@ -37633,6 +37676,19 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "packages/test-runner-core/node_modules/readdirp": {
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/readdirp/-/readdirp-4.0.1.tgz",
+      "integrity": "sha512-GkMg9uOTpIWWKbSsgwb5fA4EavTR+SG/PMPoAY8hkhHfEEY0/vqljY+XHqtDf2cr2IJtoNRDbrrEpZUiZCkYRw==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 14.16.0"
+      },
+      "funding": {
+        "type": "individual",
+        "url": "https://paulmillr.com/funding/"
+      }
+    },
     "packages/test-runner-core/node_modules/supports-color": {
       "version": "7.2.0",
       "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.2.0.tgz",
diff --git a/packages/dev-server-core/package.json b/packages/dev-server-core/package.json
index dcfe232bc..b32c4c213 100644
--- a/packages/dev-server-core/package.json
+++ b/packages/dev-server-core/package.json
@@ -61,7 +61,7 @@
     "@types/koa": "^2.11.6",
     "@types/ws": "^7.4.0",
     "@web/parse5-utils": "^2.1.0",
-    "chokidar": "^3.4.3",
+    "chokidar": "^4.0.1",
     "clone": "^2.1.2",
     "es-module-lexer": "^1.0.0",
     "get-stream": "^6.0.0",
diff --git a/packages/dev-server-core/src/server/DevServerCoreConfig.ts b/packages/dev-server-core/src/server/DevServerCoreConfig.ts
index 659e0469e..4e5621354 100644
--- a/packages/dev-server-core/src/server/DevServerCoreConfig.ts
+++ b/packages/dev-server-core/src/server/DevServerCoreConfig.ts
@@ -1,7 +1,7 @@
 import { Middleware } from 'koa';
 import { Plugin } from '../plugins/Plugin';
 import { Server } from 'net';
-import chokidar from 'chokidar';
+import type { ChokidarOptions } from 'chokidar';
 
 export type MimeTypeMappings = Record<string, string>;
 
@@ -72,5 +72,5 @@ export interface DevServerCoreConfig {
   /**
    * Additional options you want to provide to chokidar file watcher
    */
-  chokidarOptions?: chokidar.WatchOptions;
+  chokidarOptions?: ChokidarOptions;
 }
diff --git a/packages/test-runner-core/package.json b/packages/test-runner-core/package.json
index abc28e31b..b0075d925 100644
--- a/packages/test-runner-core/package.json
+++ b/packages/test-runner-core/package.json
@@ -61,7 +61,7 @@
     "@types/istanbul-reports": "^3.0.0",
     "@web/browser-logs": "^0.4.0",
     "@web/dev-server-core": "^0.7.2",
-    "chokidar": "^3.4.3",
+    "chokidar": "^4.0.1",
     "cli-cursor": "^3.1.0",
     "co-body": "^6.1.0",
     "convert-source-map": "^2.0.0",