diff --git a/org.eclipse.wildwebdeveloper/package.json b/org.eclipse.wildwebdeveloper/package.json
index 6439ba7f00..8a1da2bdbc 100644
--- a/org.eclipse.wildwebdeveloper/package.json
+++ b/org.eclipse.wildwebdeveloper/package.json
@@ -7,7 +7,7 @@
     "typescript-lit-html-plugin": "0.9.0",
     "typescript-plugin-css-modules": "5.1.0",
     "yaml-language-server": "1.17.0",
-    "vscode-css-languageservice": "6.3.3",
+    "vscode-css-languageservice": "6.3.4",
     "vscode-html-languageservice": "5.3.3",
     "vscode-json-languageservice": "5.4.4",
     "@vue/language-server" : "2.2.8",