diff --git a/package.json b/package.json
index 3ec82a3a3..c66f7f301 100644
--- a/package.json
+++ b/package.json
@@ -56,7 +56,7 @@
         "memorystore": "1.6.2",
         "mime": "2.4.6",
         "moment-timezone": "^0.5.31",
-        "mqtt": "2.18.8",
+        "mqtt": "4.2.1",
         "multer": "1.4.2",
         "mustache": "4.0.1",
         "node-red-admin": "^0.2.6",
diff --git a/packages/node_modules/@node-red/nodes/package.json b/packages/node_modules/@node-red/nodes/package.json
index eae8de2a7..505ab964a 100644
--- a/packages/node_modules/@node-red/nodes/package.json
+++ b/packages/node_modules/@node-red/nodes/package.json
@@ -31,7 +31,7 @@
         "is-utf8": "0.2.1",
         "js-yaml": "3.14.0",
         "media-typer": "1.1.0",
-        "mqtt": "2.18.8",
+        "mqtt": "4.2.1",
         "multer": "1.4.2",
         "mustache": "4.0.1",
         "on-headers": "1.0.2",