diff --git a/packages/binding-mqtt/src/mqtt-broker-server.ts b/packages/binding-mqtt/src/mqtt-broker-server.ts
index fa665b434..e87834d84 100644
--- a/packages/binding-mqtt/src/mqtt-broker-server.ts
+++ b/packages/binding-mqtt/src/mqtt-broker-server.ts
@@ -36,6 +36,7 @@ import {
 } from "@node-wot/core";
 import { InteractionOptions } from "wot-typescript-definitions";
 import { ActionElement, PropertyElement } from "wot-thing-description-types";
+import { Readable } from "stream";
 
 const { info, debug, error, warn } = createLoggers("binding-mqtt", "mqtt-broker-server");
 
@@ -246,6 +247,7 @@ export default class MqttBrokerServer implements ProtocolServer {
          * For further discussion see https://github.com/eclipse/thingweb.node-wot/pull/253
          */
         let value;
+
         if ("properties" in packet && "contentType" in packet.properties) {
             try {
                 value = ContentSerdes.get().contentToValue(
@@ -278,8 +280,11 @@ export default class MqttBrokerServer implements ProtocolServer {
             ),
         };
 
+        const contentType = action.forms[options.formIndex].contentType ?? ContentSerdes.DEFAULT;
+        const inputContent = new Content(contentType, Readable.from(value));
+
         thing
-            .handleInvokeAction(segments[this.INTERACTION_NAME_SEGMENT_INDEX], value, options)
+            .handleInvokeAction(segments[this.INTERACTION_NAME_SEGMENT_INDEX], inputContent, options)
             .then((output: unknown) => {
                 if (output) {
                     warn(
@@ -320,12 +325,11 @@ export default class MqttBrokerServer implements ProtocolServer {
                 ),
             };
 
+            const formContentType = property.forms[options.formIndex].contentType ?? ContentSerdes.DEFAULT;
+            const inputContent = new Content(formContentType, Readable.from(payload.toString()));
+
             try {
-                thing.handleWriteProperty(
-                    segments[this.INTERACTION_NAME_SEGMENT_INDEX],
-                    JSON.parse(payload.toString()),
-                    options
-                );
+                thing.handleWriteProperty(segments[this.INTERACTION_NAME_SEGMENT_INDEX], inputContent, options);
             } catch (err) {
                 error(
                     `MqttBrokerServer at ${this.brokerURI} got error on writing to property '${