diff --git a/commafeed-client/package-lock.json b/commafeed-client/package-lock.json
index 96b3c513..786b0529 100644
--- a/commafeed-client/package-lock.json
+++ b/commafeed-client/package-lock.json
@@ -67,7 +67,7 @@
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+                "vitest": "5.0.3",
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@@ -2677,14 +2677,14 @@
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-            "resolved": "https://registry.npmjs.org/@vitest/mocker/-/mocker-5.0.1.tgz",
-            "integrity": "sha512-6K1DoBNAPGvuOcSsGA4D6x+5zEEff/KmOOP3uetT2TrGpVfI+HRHRnJJfKi5ib/g1vx8IYHQD8s0pbJz8WQI7Q==",
+            "version": "5.0.3",
+            "resolved": "https://registry.npmjs.org/@vitest/mocker/-/mocker-5.0.3.tgz",
+            "integrity": "sha512-T8sWAIbkSyAjkwTcaEc3Iu0o9A27X1/kdXrizhZkGuSKScRQtRzclfAMpOTcGdXCsqxeWlpGy3XjqaW8CpLORg==",
             "dev": true,
             "license": "MIT",
             "dependencies": {
                 "@jridgewell/trace-mapping": "0.3.31",
-                "@vitest/spy": "5.0.1",
+                "@vitest/spy": "5.0.3",
                 "estree-walker": "^3.0.3",
                 "magic-string": "^1.2.3"
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@@ -2705,9 +2705,9 @@
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-            "version": "5.0.1",
-            "resolved": "https://registry.npmjs.org/@vitest/spy/-/spy-5.0.1.tgz",
-            "integrity": "sha512-rbto/mF/SGERxEgYOek7Xm6B9b+y+mVoo+f4b2LymYO8zM1b7uB5nHuhVMTP2hxdzgxvGiZYGxGIaMvL5y180Q==",
+            "version": "5.0.3",
+            "resolved": "https://registry.npmjs.org/@vitest/spy/-/spy-5.0.3.tgz",
+            "integrity": "sha512-XhFysQTB8AZ+P4gMi+Lpo99vg2AZi0qKpaB9yXQl37+CaMEAPO3iH/wGVnSyL5MPERiLezpqTVtrR6UZH5GCXg==",
             "dev": true,
             "license": "MIT",
             "funding": {
@@ -5353,13 +5353,6 @@
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             "license": "MIT"
         },
-        "node_modules/siginfo": {
-            "version": "2.0.0",
-            "resolved": "https://registry.npmjs.org/siginfo/-/siginfo-2.0.0.tgz",
-            "integrity": "sha512-ybx0WO1/8bSBLEWXZvEd7gMW3Sn3JFlW3TvX1nREbDLRNQNaeNN8WK0meBwPdAaOI7TtRRRJn/Es1zhrrCHu7g==",
-            "dev": true,
-            "license": "ISC"
-        },
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             "resolved": "https://registry.npmjs.org/signal-exit/-/signal-exit-4.1.0.tgz",
@@ -5392,13 +5385,6 @@
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-        "node_modules/stackback": {
-            "version": "0.0.2",
-            "resolved": "https://registry.npmjs.org/stackback/-/stackback-0.0.2.tgz",
-            "integrity": "sha512-1XMJE5fQo1jGH6Y/7ebnwPOBEkIEnT4QF32d5R1+VXdXveM0IBMJt8zfaxX1P3QhVwrYe+576+jkANtSS2mBbw==",
-            "dev": true,
-            "license": "MIT"
-        },
         "node_modules/state-local": {
             "version": "1.0.7",
             "resolved": "https://registry.npmjs.org/state-local/-/state-local-1.0.7.tgz",
@@ -5979,14 +5965,14 @@
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         "node_modules/vitest": {
-            "version": "5.0.1",
-            "resolved": "https://registry.npmjs.org/vitest/-/vitest-5.0.1.tgz",
-            "integrity": "sha512-iA95lQbKEkvrtTkdAgnWbXfbipWiiWe/hDl2P5tMi6WFwD76G0NxXAGp/M9EOcYupeGJRr6wppMc7CoA41TQjg==",
+            "version": "5.0.3",
+            "resolved": "https://registry.npmjs.org/vitest/-/vitest-5.0.3.tgz",
+            "integrity": "sha512-xMw97S3rjdtj5dkVat7jCsqWBpvchs3RlpQctUqwJD0KkERk40vz2fJ77lDwW/Vzh/pk18eItYAzkodhSes3jQ==",
             "dev": true,
             "license": "MIT",
             "dependencies": {
                 "@types/chai": "^5.2.2",
-                "@vitest/mocker": "5.0.1",
+                "@vitest/mocker": "5.0.3",
                 "chai": "^6.2.2",
                 "es-module-lexer": "^2.3.2",
                 "expect-type": "^1.4.0",
@@ -5994,10 +5980,10 @@
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                 "picomatch": "^4.0.7",
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-                "tinybench": "6.1.4",
-                "tinyexec": "1.3.0",
+                "tinybench": "^6.1.4",
+                "tinyexec": "^1.3.0",
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-                "why-is-node-running": "^2.3.0"
+                "why-is-node-running": "3.2.1"
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                 "vitest": "vitest.mjs"
@@ -6012,12 +5998,12 @@
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                 "@types/node": "^22.0.0 || >=24.0.0",
-                "@vitest/browser-playwright": "5.0.1",
-                "@vitest/browser-preview": "5.0.1",
+                "@vitest/browser-playwright": "5.0.3",
+                "@vitest/browser-preview": "5.0.3",
                 "@vitest/browser-webdriverio": "^5.0.0-beta.5 || >=5.0.0",
-                "@vitest/coverage-istanbul": "5.0.1",
-                "@vitest/coverage-v8": "5.0.1",
-                "@vitest/ui": "5.0.1",
+                "@vitest/coverage-istanbul": "5.0.3",
+                "@vitest/coverage-v8": "5.0.3",
+                "@vitest/ui": "5.0.3",
                 "happy-dom": "*",
                 "jsdom": "*",
                 "vite": "^6.4.0 || ^7.0.0 || ^8.0.0"
@@ -6116,20 +6102,16 @@
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-            "resolved": "https://registry.npmjs.org/why-is-node-running/-/why-is-node-running-2.3.0.tgz",
-            "integrity": "sha512-hUrmaWBdVDcxvYqnyh09zunKzROWjbZTiNy8dBEjkS7ehEDQibXJ7XvlmtbwuTclUiIyN+CyXQD4Vmko8fNm8w==",
+            "version": "3.2.1",
+            "resolved": "https://registry.npmjs.org/why-is-node-running/-/why-is-node-running-3.2.1.tgz",
+            "integrity": "sha512-Tb2FUhB4vUsGQlfSquQLYkApkuPAFQXGFzxWKHHumVz2dK+X1RUm/HnID4+TfIGYJ1kTcwOaCk/buYCEJr6YjQ==",
             "dev": true,
             "license": "MIT",
-            "dependencies": {
-                "siginfo": "^2.0.0",
-                "stackback": "0.0.2"
-            },
             "bin": {
                 "why-is-node-running": "cli.js"
             },
             "engines": {
-                "node": ">=8"
+                "node": ">=20.11"
             }
         },
         "node_modules/xml-name-validator": {
diff --git a/commafeed-client/package.json b/commafeed-client/package.json
index c03e6a4d..5b56ce67 100644
--- a/commafeed-client/package.json
+++ b/commafeed-client/package.json
@@ -74,7 +74,7 @@
         "typescript": "7.0.2",
         "vite": "8.3.4",
         "vite-plugin-checker": "0.14.5",
-        "vitest": "5.0.1",
+        "vitest": "5.0.3",
         "yaml": "2.9.1"
     },
     "overrides": {