diff --git a/apps/pwa/package.json b/apps/pwa/package.json
index 3488fb6..1c0fa6d 100644
--- a/apps/pwa/package.json
+++ b/apps/pwa/package.json
@@ -22,6 +22,6 @@
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     "vite": "^7.3.0",
     "vite-plugin-pwa": "^1.3.0",
-    "vitest": "^3.2.4"
+    "vitest": "^5.0.0"
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 }
diff --git a/apps/windows/package.json b/apps/windows/package.json
index 9042d3d..a14d1c8 100644
--- a/apps/windows/package.json
+++ b/apps/windows/package.json
@@ -45,6 +45,6 @@
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 }
diff --git a/package-lock.json b/package-lock.json
index 726a20a..e3f32dd 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -40,7 +40,7 @@
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-        "vitest": "^3.2.4"
+        "vitest": "^5.0.0"
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+        "vite": "^6.0.0 || ^7.0.0 || ^8.0.0"
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+      "resolved": "https://registry.npmjs.org/obug/-/obug-2.2.1.tgz",
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+      "dev": true,
+      "funding": [
+        "https://github.com/sponsors/sxzz",
+        "https://opencollective.com/debug"
+      ],
+      "license": "MIT",
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-    "node_modules/tinyspy": {
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-      "resolved": "https://registry.npmjs.org/tinyspy/-/tinyspy-4.0.4.tgz",
-      "integrity": "sha512-azl+t0z7pw/z958Gy9svOTuzqIk6xq+NSheJzn5MMWtWTFywIacg2wUlzKFGtt3cthx0r2SxMK0yzJOR0IES7Q==",
-      "dev": true,
-      "license": "MIT",
-      "engines": {
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       "resolved": "https://registry.npmjs.org/tldts/-/tldts-7.4.4.tgz",
@@ -8790,29 +8632,6 @@
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-      "resolved": "https://registry.npmjs.org/vite-node/-/vite-node-3.2.4.tgz",
-      "integrity": "sha512-EbKSKh+bh1E1IFxeO0pg1n4dvoOTt0UDiXMd/qn++r98+jPO1xtJilvXldeuQ8giIB5IkpjCgMleHMNEsGH6pg==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "cac": "^6.7.14",
-        "debug": "^4.4.1",
-        "es-module-lexer": "^1.7.0",
-        "pathe": "^2.0.3",
-        "vite": "^5.0.0 || ^6.0.0 || ^7.0.0-0"
-      },
-      "bin": {
-        "vite-node": "vite-node.mjs"
-      },
-      "engines": {
-        "node": "^18.0.0 || ^20.0.0 || >=22.0.0"
-      },
-      "funding": {
-        "url": "https://opencollective.com/vitest"
-      }
-    },
     "node_modules/vite-plugin-pwa": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/vite-plugin-pwa/-/vite-plugin-pwa-1.3.0.tgz",
@@ -8859,65 +8678,72 @@
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-      "version": "3.2.6",
-      "resolved": "https://registry.npmjs.org/vitest/-/vitest-3.2.6.tgz",
-      "integrity": "sha512-xejya+bT/j/+R/AGa1XOfRxLmNUlLtlwjRsFUILF+xHfzElmGcmFydy2gqqIrd62ptIEfwVMofd19uNWD9L7Nw==",
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/vitest/-/vitest-5.0.0.tgz",
+      "integrity": "sha512-gpsMNoRhMjMktVxPtstOH4/PJuPyovVaMDr4oDilXaGH1EcqM2OE96SoHT2VIQ6fTGtTjqmHDrEu2X9RQiXf8Q==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
         "@types/chai": "^5.2.2",
-        "@vitest/expect": "3.2.6",
-        "@vitest/mocker": "3.2.6",
-        "@vitest/pretty-format": "^3.2.6",
-        "@vitest/runner": "3.2.6",
-        "@vitest/snapshot": "3.2.6",
-        "@vitest/spy": "3.2.6",
-        "@vitest/utils": "3.2.6",
-        "chai": "^5.2.0",
-        "debug": "^4.4.1",
-        "expect-type": "^1.2.1",
-        "magic-string": "^0.30.17",
-        "pathe": "^2.0.3",
-        "picomatch": "^4.0.2",
-        "std-env": "^3.9.0",
-        "tinybench": "^2.9.0",
-        "tinyexec": "^0.3.2",
-        "tinyglobby": "^0.2.14",
-        "tinypool": "^1.1.1",
-        "tinyrainbow": "^2.0.0",
-        "vite": "^5.0.0 || ^6.0.0 || ^7.0.0-0",
-        "vite-node": "3.2.4",
+        "@vitest/mocker": "5.0.0",
+        "chai": "^6.2.2",
+        "es-module-lexer": "^2.3.2",
+        "expect-type": "^1.4.0",
+        "magic-string": "^1.2.3",
+        "obug": "^2.1.4",
+        "picomatch": "^4.0.7",
+        "std-env": "^4.2.0",
+        "tinybench": "6.1.4",
+        "tinyexec": "1.3.0",
+        "tinyglobby": "^0.2.17",
         "why-is-node-running": "^2.3.0"
       },
       "bin": {
         "vitest": "vitest.mjs"
       },
       "engines": {
-        "node": "^18.0.0 || ^20.0.0 || >=22.0.0"
+        "node": "^22.12.0 || ^24.0.0 || >=26.0.0"
       },
       "funding": {
         "url": "https://opencollective.com/vitest"
       },
       "peerDependencies": {
         "@edge-runtime/vm": "*",
-        "@types/debug": "^4.1.12",
-        "@types/node": "^18.0.0 || ^20.0.0 || >=22.0.0",
-        "@vitest/browser": "3.2.6",
-        "@vitest/ui": "3.2.6",
+        "@opentelemetry/api": "^1.9.0",
+        "@types/node": "^22.0.0 || >=24.0.0",
+        "@vitest/browser-playwright": "5.0.0",
+        "@vitest/browser-preview": "5.0.0",
+        "@vitest/browser-webdriverio": "^5.0.0-beta.5 || >=5.0.0",
+        "@vitest/coverage-istanbul": "5.0.0",
+        "@vitest/coverage-v8": "5.0.0",
+        "@vitest/ui": "5.0.0",
         "happy-dom": "*",
-        "jsdom": "*"
+        "jsdom": "*",
+        "vite": "^6.4.0 || ^7.0.0 || ^8.0.0"
       },
       "peerDependenciesMeta": {
         "@edge-runtime/vm": {
           "optional": true
         },
-        "@types/debug": {
+        "@opentelemetry/api": {
           "optional": true
         },
         "@types/node": {
           "optional": true
         },
-        "@vitest/browser": {
+        "@vitest/browser-playwright": {
+          "optional": true
+        },
+        "@vitest/browser-preview": {
+          "optional": true
+        },
+        "@vitest/browser-webdriverio": {
+          "optional": true
+        },
+        "@vitest/coverage-istanbul": {
+          "optional": true
+        },
+        "@vitest/coverage-v8": {
           "optional": true
         },
         "@vitest/ui": {
@@ -8928,9 +8754,22 @@
         },
         "jsdom": {
           "optional": true
+        },
+        "vite": {
+          "optional": false
         }
       }
     },
+    "node_modules/vitest/node_modules/magic-string": {
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/magic-string/-/magic-string-1.3.1.tgz",
+      "integrity": "sha512-rm91zr2Ou+XueDTohjQQjdQEcYM6zVi8KVUCG8Ec3vHwUEKrhSdCNyfuIywkA6hcCAteIn0ZOtAHA6eGpiX+Pg==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@jridgewell/sourcemap-codec": "^1.6.0"
+      }
+    },
     "node_modules/w3c-keyname": {
       "version": "2.2.8",
       "resolved": "https://registry.npmjs.org/w3c-keyname/-/w3c-keyname-2.2.8.tgz",
@@ -9694,7 +9533,7 @@
         "@types/yazl": "^3.3.1",
         "esbuild": "^0.28.1",
         "typescript": "^5.9.3",
-        "vitest": "^3.2.4"
+        "vitest": "^5.0.0"
       }
     },
     "packages/shared": {
@@ -9703,7 +9542,7 @@
       "license": "GPL-3.0-only",
       "devDependencies": {
         "typescript": "^5.9.3",
-        "vitest": "^3.2.4"
+        "vitest": "^5.0.0"
       }
     },
     "packages/sync-contract": {
@@ -9716,7 +9555,7 @@
       "devDependencies": {
         "@types/node": "^24.10.3",
         "typescript": "^5.9.3",
-        "vitest": "^3.2.4"
+        "vitest": "^5.0.0"
       }
     }
   }
diff --git a/packages/core-server/package.json b/packages/core-server/package.json
index f91e29d..c64a7f4 100644
--- a/packages/core-server/package.json
+++ b/packages/core-server/package.json
@@ -48,6 +48,6 @@
     "@types/yazl": "^3.3.1",
     "esbuild": "^0.28.1",
     "typescript": "^5.9.3",
-    "vitest": "^3.2.4"
+    "vitest": "^5.0.0"
   }
 }
diff --git a/packages/shared/package.json b/packages/shared/package.json
index b4eba23..c6042f9 100644
--- a/packages/shared/package.json
+++ b/packages/shared/package.json
@@ -18,6 +18,6 @@
   },
   "devDependencies": {
     "typescript": "^5.9.3",
-    "vitest": "^3.2.4"
+    "vitest": "^5.0.0"
   }
 }
diff --git a/packages/sync-contract/package.json b/packages/sync-contract/package.json
index 70aa1e6..196bccd 100644
--- a/packages/sync-contract/package.json
+++ b/packages/sync-contract/package.json
@@ -22,6 +22,6 @@
   "devDependencies": {
     "@types/node": "^24.10.3",
     "typescript": "^5.9.3",
-    "vitest": "^3.2.4"
+    "vitest": "^5.0.0"
   }
 }