diff --git a/packages/crates-io-msw/package.json b/packages/crates-io-msw/package.json
index 9b5322cb2d2..6e67c849b9b 100644
--- a/packages/crates-io-msw/package.json
+++ b/packages/crates-io-msw/package.json
@@ -23,7 +23,7 @@
     "semver": "7.7.2"
   },
   "devDependencies": {
-    "happy-dom": "17.4.7",
+    "happy-dom": "17.5.6",
     "vitest": "3.1.4"
   }
 }
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index d42f2bee790..8fb24ad4497 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -327,11 +327,11 @@ importers:
         version: 7.7.2
     devDependencies:
       happy-dom:
-        specifier: 17.4.7
-        version: 17.4.7
+        specifier: 17.5.6
+        version: 17.5.6
       vitest:
         specifier: 3.1.4
-        version: 3.1.4(@types/node@22.15.21)(happy-dom@17.4.7)(jsdom@25.0.1)(msw@2.8.4(@types/node@22.15.21)(typescript@5.8.3))(terser@5.39.2)(yaml@2.8.0)
+        version: 3.1.4(@types/node@22.15.21)(happy-dom@17.5.6)(jsdom@25.0.1)(msw@2.8.4(@types/node@22.15.21)(typescript@5.8.3))(terser@5.39.2)(yaml@2.8.0)
 
 packages:
 
@@ -5249,8 +5249,8 @@ packages:
     engines: {node: '>=0.4.7'}
     hasBin: true
 
-  happy-dom@17.4.7:
-    resolution: {integrity: sha512-NZypxadhCiV5NT4A+Y86aQVVKQ05KDmueja3sz008uJfDRwz028wd0aTiJPwo4RQlvlz0fznkEEBBCHVNWc08g==}
+  happy-dom@17.5.6:
+    resolution: {integrity: sha512-B4U6jKuiizwCJ2WP0YreQmRdeBrHKOXhpz7YUbbwdSAKfWEhdG4UfWZOZTZ5Oejs/9yJtk7xmbfp8YdVL9LVFA==}
     engines: {node: '>=18.0.0'}
 
   has-ansi@3.0.0:
@@ -15100,7 +15100,7 @@ snapshots:
     optionalDependencies:
       uglify-js: 3.19.3
 
-  happy-dom@17.4.7:
+  happy-dom@17.5.6:
     dependencies:
       webidl-conversions: 7.0.0
       whatwg-mimetype: 3.0.0
@@ -18472,7 +18472,7 @@ snapshots:
       terser: 5.39.2
       yaml: 2.8.0
 
-  vitest@3.1.4(@types/node@22.15.21)(happy-dom@17.4.7)(jsdom@25.0.1)(msw@2.8.4(@types/node@22.15.21)(typescript@5.8.3))(terser@5.39.2)(yaml@2.8.0):
+  vitest@3.1.4(@types/node@22.15.21)(happy-dom@17.5.6)(jsdom@25.0.1)(msw@2.8.4(@types/node@22.15.21)(typescript@5.8.3))(terser@5.39.2)(yaml@2.8.0):
     dependencies:
       '@vitest/expect': 3.1.4
       '@vitest/mocker': 3.1.4(msw@2.8.4(@types/node@22.15.21)(typescript@5.8.3))(vite@6.3.5(@types/node@22.15.21)(terser@5.39.2)(yaml@2.8.0))
@@ -18497,7 +18497,7 @@ snapshots:
       why-is-node-running: 2.3.0
     optionalDependencies:
       '@types/node': 22.15.21
-      happy-dom: 17.4.7
+      happy-dom: 17.5.6
       jsdom: 25.0.1(supports-color@8.1.1)
     transitivePeerDependencies:
       - jiti