diff --git a/org.eclipse.xtext.web/package-lock.json b/org.eclipse.xtext.web/package-lock.json
index d5d4aa74..432b97a6 100644
--- a/org.eclipse.xtext.web/package-lock.json
+++ b/org.eclipse.xtext.web/package-lock.json
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diff --git a/org.eclipse.xtext.web/package.json b/org.eclipse.xtext.web/package.json
index b8a36180..2ac31ee9 100644
--- a/org.eclipse.xtext.web/package.json
+++ b/org.eclipse.xtext.web/package.json
@@ -2,7 +2,7 @@
 	"name": "xtext",
 	"private": true,
 	"devDependencies": {
-		"mocha": "^8.3.2",
+		"mocha": "^9.1.1",
 		"requirejs": "2.3.6"
 	}
 }