diff --git a/packages/core/package.json b/packages/core/package.json
index 4966adf9..c1428248 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -50,7 +50,7 @@
     "test": "npx rstest --globals"
   },
   "dependencies": {
-    "chai": "^5.3.3",
+    "chai": "^6.0.1",
     "@types/chai": "^5.2.2",
     "@rsbuild/core": "1.5.0",
     "birpc": "2.5.0",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 7dd8dd68..8994c724 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -417,8 +417,8 @@ importers:
         specifier: 2.5.0
         version: 2.5.0
       chai:
-        specifier: ^5.3.3
-        version: 5.3.3
+        specifier: ^6.0.1
+        version: 6.0.1
       pathe:
         specifier: ^2.0.3
         version: 2.0.3
@@ -2426,6 +2426,10 @@ packages:
     resolution: {integrity: sha512-4zNhdJD/iOjSH0A05ea+Ke6MU5mmpQcbQsSOkgdaUMJ9zTlDTD/GYlwohmIE2u0gaxHYiVHEn1Fw9mZ/ktJWgw==}
     engines: {node: '>=18'}
 
+  chai@6.0.1:
+    resolution: {integrity: sha512-/JOoU2//6p5vCXh00FpNgtlw0LjvhGttaWc+y7wpW9yjBm3ys0dI8tSKZxIOgNruz5J0RleccatSIC3uxEZP0g==}
+    engines: {node: '>=18'}
+
   chalk@4.1.2:
     resolution: {integrity: sha512-oKnbhFyRIXpUuez8iBMmyEa4nbj4IOQyuhc/wy9kY7/WVPcwIO9VA668Pu8RkO7+0G76SLROeyw9CpQ061i4mA==}
     engines: {node: '>=10'}
@@ -7243,6 +7247,8 @@ snapshots:
       loupe: 3.1.4
       pathval: 2.0.0
 
+  chai@6.0.1: {}
+
   chalk@4.1.2:
     dependencies:
       ansi-styles: 4.3.0