diff --git a/package.json b/package.json
index d2f4981..3d916b3 100644
--- a/package.json
+++ b/package.json
@@ -22,10 +22,10 @@
     "release": "turbo build && changeset publish"
   },
   "devDependencies": {
-    "@biomejs/biome": "^1.9.4",
+    "@biomejs/biome": "^2.3.8",
     "@changesets/cli": "^2.29.7",
     "@iarna/toml": "^2.2.5",
-    "@types/node": "^22.9.0",
+    "@types/node": "^25.0.2",
     "csv-parse": "^6.1.0",
     "csv-stringify": "^6.6.0",
     "d3-dsv": "^3.0.1",
diff --git a/packages/csv/package.json b/packages/csv/package.json
index dad9b90..8d31982 100644
--- a/packages/csv/package.json
+++ b/packages/csv/package.json
@@ -40,10 +40,10 @@
   "author": "sylphx",
   "license": "MIT",
   "devDependencies": {
-    "@types/node": "^20.0.0",
+    "@types/node": "^25.0.2",
     "tsup": "^8.0.0",
     "typescript": "^5.0.0",
-    "vitest": "^1.0.0"
+    "vitest": "^4.0.15"
   },
   "repository": {
     "url": "git+https://github.com/SylphxAI/molt.git"
diff --git a/packages/ini/package.json b/packages/ini/package.json
index 00437c6..4a800f9 100644
--- a/packages/ini/package.json
+++ b/packages/ini/package.json
@@ -47,10 +47,10 @@
   },
   "homepage": "https://github.com/SylphxAI/molt#readme",
   "devDependencies": {
-    "ini": "^5.0.0",
+    "ini": "^6.0.0",
     "tsup": "^8.3.5",
     "typescript": "^5.6.3",
-    "vitest": "^2.1.8"
+    "vitest": "^4.0.15"
   },
   "publishConfig": {
     "access": "public"
diff --git a/packages/json/package.json b/packages/json/package.json
index 74e77f9..2a0e7aa 100644
--- a/packages/json/package.json
+++ b/packages/json/package.json
@@ -60,15 +60,15 @@
   },
   "homepage": "https://github.com/SylphxAI/molt#readme",
   "devDependencies": {
-    "@biomejs/biome": "^1.9.4",
-    "@types/node": "^22.9.0",
-    "@vitest/ui": "^2.1.5",
+    "@biomejs/biome": "^2.3.8",
+    "@types/node": "^25.0.2",
+    "@vitest/ui": "^4.0.15",
     "dirty-json": "^0.9.2",
     "superjson": "^2.2.5",
-    "tinybench": "^2.9.0",
+    "tinybench": "^6.0.0",
     "tsup": "^8.3.5",
     "typescript": "^5.6.3",
-    "vitest": "^2.1.5",
+    "vitest": "^4.0.15",
     "zod": "^4.1.12"
   },
   "engines": {
diff --git a/packages/molt/package.json b/packages/molt/package.json
index f76451e..e84bb6b 100644
--- a/packages/molt/package.json
+++ b/packages/molt/package.json
@@ -73,7 +73,7 @@
     "@sylphx/molt-toon": "workspace:*"
   },
   "devDependencies": {
-    "@types/node": "^22.9.0",
+    "@types/node": "^25.0.2",
     "tsup": "^8.3.5",
     "typescript": "^5.6.3"
   },
diff --git a/packages/msgpack/package.json b/packages/msgpack/package.json
index e4e9079..acdc6d7 100644
--- a/packages/msgpack/package.json
+++ b/packages/msgpack/package.json
@@ -52,7 +52,7 @@
     "msgpack-lite": "^0.1.26",
     "tsup": "^8.3.5",
     "typescript": "^5.6.3",
-    "vitest": "^2.1.8"
+    "vitest": "^4.0.15"
   },
   "publishConfig": {
     "access": "public"
diff --git a/packages/toml/package.json b/packages/toml/package.json
index 9e5762e..c1487ba 100644
--- a/packages/toml/package.json
+++ b/packages/toml/package.json
@@ -39,10 +39,10 @@
   "author": "sylphx",
   "license": "MIT",
   "devDependencies": {
-    "@types/node": "^20.0.0",
+    "@types/node": "^25.0.2",
     "tsup": "^8.0.0",
     "typescript": "^5.0.0",
-    "vitest": "^1.0.0"
+    "vitest": "^4.0.15"
   },
   "repository": {
     "url": "git+https://github.com/SylphxAI/molt.git"
diff --git a/packages/toon/package.json b/packages/toon/package.json
index 17e318c..d75af07 100644
--- a/packages/toon/package.json
+++ b/packages/toon/package.json
@@ -52,7 +52,7 @@
   "devDependencies": {
     "tsup": "^8.3.5",
     "typescript": "^5.6.3",
-    "vitest": "^2.1.8"
+    "vitest": "^4.0.15"
   },
   "publishConfig": {
     "access": "public"
diff --git a/packages/xml/package.json b/packages/xml/package.json
index 7514721..b992cd7 100644
--- a/packages/xml/package.json
+++ b/packages/xml/package.json
@@ -54,12 +54,12 @@
   },
   "homepage": "https://github.com/SylphxAI/molt#readme",
   "devDependencies": {
-    "@biomejs/biome": "^1.9.4",
-    "@types/node": "^22.9.0",
-    "@vitest/ui": "^2.1.5",
+    "@biomejs/biome": "^2.3.8",
+    "@types/node": "^25.0.2",
+    "@vitest/ui": "^4.0.15",
     "tsup": "^8.3.5",
     "typescript": "^5.6.3",
-    "vitest": "^2.1.5"
+    "vitest": "^4.0.15"
   },
   "engines": {
     "bun": ">=1.0"
diff --git a/packages/yaml/package.json b/packages/yaml/package.json
index 1eb6adb..23697d5 100644
--- a/packages/yaml/package.json
+++ b/packages/yaml/package.json
@@ -54,12 +54,12 @@
   },
   "homepage": "https://github.com/SylphxAI/molt#readme",
   "devDependencies": {
-    "@biomejs/biome": "^1.9.4",
-    "@types/node": "^22.9.0",
-    "@vitest/ui": "^2.1.5",
+    "@biomejs/biome": "^2.3.8",
+    "@types/node": "^25.0.2",
+    "@vitest/ui": "^4.0.15",
     "tsup": "^8.3.5",
     "typescript": "^5.6.3",
-    "vitest": "^2.1.5"
+    "vitest": "^4.0.15"
   },
   "engines": {
     "bun": ">=1.0"