diff --git a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/mqtt/TbMqttNode.java b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/mqtt/TbMqttNode.java
index 2cd26e667d..694fed1bf8 100644
--- a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/mqtt/TbMqttNode.java
+++ b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/mqtt/TbMqttNode.java
@@ -207,7 +207,7 @@ public class TbMqttNode extends TbAbstractExternalNode {
                 String protocolVersion = "protocolVersion";
                 if (!oldConfiguration.has(protocolVersion)) {
                     hasChanges = true;
-                    ((ObjectNode) oldConfiguration).put(protocolVersion, MqttVersion.MQTT_3_1_1.name());
+                    ((ObjectNode) oldConfiguration).put(protocolVersion, MqttVersion.MQTT_3_1.name());
                 }
                 break;
             default:
diff --git a/rule-engine/rule-engine-components/src/test/java/org/thingsboard/rule/engine/mqtt/TbMqttNodeTest.java b/rule-engine/rule-engine-components/src/test/java/org/thingsboard/rule/engine/mqtt/TbMqttNodeTest.java
index 55ce8bf53e..b67aef00f0 100644
--- a/rule-engine/rule-engine-components/src/test/java/org/thingsboard/rule/engine/mqtt/TbMqttNodeTest.java
+++ b/rule-engine/rule-engine-components/src/test/java/org/thingsboard/rule/engine/mqtt/TbMqttNodeTest.java
@@ -407,17 +407,17 @@ public class TbMqttNodeTest extends AbstractRuleNodeUpgradeTest {
                 Arguments.of(0,
                         "{\"topicPattern\":\"my-topic\",\"port\":1883,\"connectTimeoutSec\":10,\"cleanSession\":true, \"ssl\":false, \"retainedMessage\":false,\"credentials\":{\"type\":\"anonymous\"}}",
                         true,
-                        "{\"topicPattern\":\"my-topic\",\"port\":1883,\"connectTimeoutSec\":10,\"cleanSession\":true, \"ssl\":false, \"retainedMessage\":false,\"credentials\":{\"type\":\"anonymous\"},\"parseToPlainText\":false, \"protocolVersion\":\"MQTT_3_1_1\"}"),
+                        "{\"topicPattern\":\"my-topic\",\"port\":1883,\"connectTimeoutSec\":10,\"cleanSession\":true, \"ssl\":false, \"retainedMessage\":false,\"credentials\":{\"type\":\"anonymous\"},\"parseToPlainText\":false, \"protocolVersion\":\"MQTT_3_1\"}"),
                 // default config for version 1 with upgrade from version 0
                 Arguments.of(1,
                         "{\"topicPattern\":\"my-topic\",\"port\":1883,\"connectTimeoutSec\":10,\"cleanSession\":true, \"ssl\":false, \"retainedMessage\":false,\"credentials\":{\"type\":\"anonymous\"},\"parseToPlainText\":false}",
                         true,
-                        "{\"topicPattern\":\"my-topic\",\"port\":1883,\"connectTimeoutSec\":10,\"cleanSession\":true, \"ssl\":false, \"retainedMessage\":false,\"credentials\":{\"type\":\"anonymous\"},\"parseToPlainText\":false, \"protocolVersion\":\"MQTT_3_1_1\"}"),
+                        "{\"topicPattern\":\"my-topic\",\"port\":1883,\"connectTimeoutSec\":10,\"cleanSession\":true, \"ssl\":false, \"retainedMessage\":false,\"credentials\":{\"type\":\"anonymous\"},\"parseToPlainText\":false, \"protocolVersion\":\"MQTT_3_1\"}"),
                 // default config for version 2 with upgrade from version 1
                 Arguments.of(2,
-                        "{\"topicPattern\":\"my-topic\",\"port\":1883,\"connectTimeoutSec\":10,\"cleanSession\":true, \"ssl\":false, \"retainedMessage\":false,\"credentials\":{\"type\":\"anonymous\"},\"parseToPlainText\":false, \"protocolVersion\":\"MQTT_3_1_1\"}",
+                        "{\"topicPattern\":\"my-topic\",\"port\":1883,\"connectTimeoutSec\":10,\"cleanSession\":true, \"ssl\":false, \"retainedMessage\":false,\"credentials\":{\"type\":\"anonymous\"},\"parseToPlainText\":false, \"protocolVersion\":\"MQTT_3_1\"}",
                         false,
-                        "{\"topicPattern\":\"my-topic\",\"port\":1883,\"connectTimeoutSec\":10,\"cleanSession\":true, \"ssl\":false, \"retainedMessage\":false,\"credentials\":{\"type\":\"anonymous\"},\"parseToPlainText\":false, \"protocolVersion\":\"MQTT_3_1_1\"}")
+                        "{\"topicPattern\":\"my-topic\",\"port\":1883,\"connectTimeoutSec\":10,\"cleanSession\":true, \"ssl\":false, \"retainedMessage\":false,\"credentials\":{\"type\":\"anonymous\"},\"parseToPlainText\":false, \"protocolVersion\":\"MQTT_3_1\"}")
         );
     }