diff --git a/javascript/packages/language-server/package.json b/javascript/packages/language-server/package.json
index c51acd25e..35c50f0f5 100644
--- a/javascript/packages/language-server/package.json
+++ b/javascript/packages/language-server/package.json
@@ -56,6 +56,6 @@
     "vscode-languageserver-textdocument": "^1.0.12"
   },
   "devDependencies": {
-    "@types/node": "^25.6.0"
+    "@types/node": "^26.0.0"
   }
 }
diff --git a/javascript/packages/tailwind-class-sorter/package.json b/javascript/packages/tailwind-class-sorter/package.json
index c6f8ba652..c8572bbe1 100644
--- a/javascript/packages/tailwind-class-sorter/package.json
+++ b/javascript/packages/tailwind-class-sorter/package.json
@@ -46,7 +46,7 @@
     "postcss-import": "^16.1.1"
   },
   "devDependencies": {
-    "@types/node": "^25.6.0",
+    "@types/node": "^26.0.0",
     "tailwindcss": "^3.4.17"
   },
   "peerDependencies": {
diff --git a/javascript/packages/vscode/package.json b/javascript/packages/vscode/package.json
index 06593d215..5cf91976d 100644
--- a/javascript/packages/vscode/package.json
+++ b/javascript/packages/vscode/package.json
@@ -289,7 +289,7 @@
     "@herb-tools/linter": "0.10.1",
     "@herb-tools/node-wasm": "0.10.1",
     "@types/mocha": "^10.0.10",
-    "@types/node": "25.x",
+    "@types/node": "26.x",
     "@types/vscode": "^1.120.0",
     "@vscode/test-cli": "^0.0.12",
     "@vscode/test-electron": "^3.0.0",
diff --git a/playground/package.json b/playground/package.json
index 46676a30d..3090bdfa8 100644
--- a/playground/package.json
+++ b/playground/package.json
@@ -33,7 +33,7 @@
   },
   "devDependencies": {
     "@types/express": "^5.0.6",
-    "@types/node": "^25.6.0",
+    "@types/node": "^26.0.0",
     "@vitejs/plugin-vue": "^6.0.6"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index 17adfed73..a96254e4c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2122,19 +2122,12 @@
   resolved "https://registry.npmjs.org/@types/ms/-/ms-2.1.0.tgz"
   integrity sha512-GsCCIZDE/p3i96vtEqx+7dBUGXrc7zeSK3wwPHIaRThS+9OhWIXRqzs4d6k1SVU8g91DrNRWxWUGhp5KXQb2VA==
 
-"@types/node@*", "@types/node@25.x", "@types/node@>=18", "@types/node@^25.6.0":
-  version "25.6.0"
-  resolved "https://registry.yarnpkg.com/@types/node/-/node-25.6.0.tgz#4e09bad9b469871f2d0f68140198cbd714f4edca"
-  integrity sha512-+qIYRKdNYJwY3vRCZMdJbPLJAtGjQBudzZzdzwQYkEPQd+PJGixUL5QfvCLDaULoLv+RhT3LDkwEfKaAkgSmNQ==
+"@types/node@*", "@types/node@26.x", "@types/node@>=18", "@types/node@>=18.19.0", "@types/node@^26.0.0":
+  version "26.0.0"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-26.0.0.tgz#d4aece9e9412e9f2008d59bc2d74f5279316b665"
+  integrity sha512-vf2YFi1iY9lHGwNJMs01biZFbKJkrZR1T6/MlzjhJLPdntOHLhTrDSnSVcdtvjihi4VQNlrFRIxLsDBlQpAipA==
   dependencies:
-    undici-types "~7.19.0"
-
-"@types/node@>=18.19.0":
-  version "25.9.1"
-  resolved "https://registry.yarnpkg.com/@types/node/-/node-25.9.1.tgz#3bda556db500ae4319c08e7fc9ab94f19013ba0b"
-  integrity sha512-xfrlY7UD5rMJk3ZVJP8BNzS28J36YJg+xp+LPXV1TdWxr8uMH5A860QNxYDGQe/ylDSgjxE52Q9VnO7p75tJxg==
-  dependencies:
-    undici-types ">=7.24.0 <7.24.7"
+    undici-types "~8.3.0"
 
 "@types/normalize-package-data@^2.4.3", "@types/normalize-package-data@^2.4.4":
   version "2.4.4"
@@ -2408,10 +2401,10 @@
     supports-color "^10.2.2"
     yargs "^17.7.2"
 
-"@vscode/test-electron@^2.5.2":
-  version "2.5.2"
-  resolved "https://registry.yarnpkg.com/@vscode/test-electron/-/test-electron-2.5.2.tgz#f7d4078e8230ce9c94322f2a29cc16c17954085d"
-  integrity sha512-8ukpxv4wYe0iWMRQU18jhzJOHkeGKbnw7xWRX3Zw1WJA4cEKbHcmmLPdPrPtL6rhDcrlCZN+xKRpv09n4gRHYg==
+"@vscode/test-electron@^3.0.0":
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/@vscode/test-electron/-/test-electron-3.0.0.tgz#6a27d6992e4c89b2a229cbed3e990afe2b3575ef"
+  integrity sha512-TY5mC7aAjxSLDXsyjhrG8cJHgc/HLdiE5lvtW7hABYQrY24Qwozzr5UoO3HiuAM4Hzz4b7K/eZlwrCILj94CcA==
   dependencies:
     http-proxy-agent "^7.0.2"
     https-proxy-agent "^7.0.5"
@@ -9670,15 +9663,10 @@ underscore@^1.12.1:
   resolved "https://registry.yarnpkg.com/underscore/-/underscore-1.13.8.tgz#a93a21186c049dbf0e847496dba72b7bd8c1e92b"
   integrity sha512-DXtD3ZtEQzc7M8m4cXotyHR+FAS18C64asBYY5vqZexfYryNNnDc02W4hKg3rdQuqOYas1jkseX0+nZXjTXnvQ==
 
-"undici-types@>=7.24.0 <7.24.7":
-  version "7.24.6"
-  resolved "https://registry.yarnpkg.com/undici-types/-/undici-types-7.24.6.tgz#61275b485d7fd4e9d269c7cf04ec2873c9cc0f91"
-  integrity sha512-WRNW+sJgj5OBN4/0JpHFqtqzhpbnV0GuB+OozA9gCL7a993SmU+1JBZCzLNxYsbMfIeDL+lTsphD5jN5N+n0zg==
-
-undici-types@~7.19.0:
-  version "7.19.2"
-  resolved "https://registry.yarnpkg.com/undici-types/-/undici-types-7.19.2.tgz#1b67fc26d0f157a0cba3a58a5b5c1e2276b8ba2a"
-  integrity sha512-qYVnV5OEm2AW8cJMCpdV20CDyaN3g0AjDlOGf1OW4iaDEx8MwdtChUp4zu4H0VP3nDRF/8RKWH+IPp9uW0YGZg==
+undici-types@~8.3.0:
+  version "8.3.0"
+  resolved "https://registry.yarnpkg.com/undici-types/-/undici-types-8.3.0.tgz#44e9fc9f3244648cdea35e4f9bb2d681e9410809"
+  integrity sha512-j375ScV60dom+YkPFIfTLcOiPxkN/buHz5GobjLhixFuANaNs3C9l4GmrWqejgXWJ7BbJcFYpTEUkS1Ge8bpZQ==
 
 undici@^6.25.0:
   version "6.26.0"