diff --git a/test/bundling/fixtures/next-webpack4/package.json b/test/bundling/fixtures/next-webpack4/package.json
index 25d9767b408558..d4f94b7e064b4e 100644
--- a/test/bundling/fixtures/next-webpack4/package.json
+++ b/test/bundling/fixtures/next-webpack4/package.json
@@ -17,7 +17,7 @@
     "@mui/styles": "workspace:*",
     "@mui/system": "workspace:*",
     "@mui/utils": "workspace:*",
-    "next": "14.2.15",
+    "next": "14.2.21",
     "react": "^17.0.2",
     "react-dom": "^17.0.2",
     "react-is": "^17.0.2"
diff --git a/test/bundling/fixtures/next-webpack5/package.json b/test/bundling/fixtures/next-webpack5/package.json
index 5c70b1c6954ccb..93c23a686552f7 100644
--- a/test/bundling/fixtures/next-webpack5/package.json
+++ b/test/bundling/fixtures/next-webpack5/package.json
@@ -16,7 +16,7 @@
     "@mui/styles": "workspace:*",
     "@mui/system": "workspace:*",
     "@mui/utils": "workspace:*",
-    "next": "14.2.15",
+    "next": "14.2.21",
     "react": "18.2.0",
     "react-dom": "18.2.0",
     "react-is": "18.2.0"