diff --git a/mqtt_client.c b/mqtt_client.c
index b224a00..9a041b2 100644
--- a/mqtt_client.c
+++ b/mqtt_client.c
@@ -1022,7 +1022,7 @@ static esp_err_t deliver_publish(esp_mqtt_client_handle_t client)
             ESP_LOGE(TAG, "%s: mqtt_get_publish_topic() failed", __func__);
             return ESP_FAIL;
         }
-        ESP_LOGD(TAG, "%s: msg_topic_len=%zu", __func__, msg_topic_len);
+        ESP_LOGD(TAG, "%s: msg_topic_len=%"PRIu32, __func__, msg_topic_len);
 
         // get payload
         msg_data = mqtt_get_publish_data(msg_buf, &msg_data_len);
@@ -1044,7 +1044,7 @@ static esp_err_t deliver_publish(esp_mqtt_client_handle_t client)
     client->event.dup = mqtt_get_dup(msg_buf);
     client->event.total_data_len = msg_data_len + msg_total_len - msg_read_len;
 post_data_event:
-    ESP_LOGD(TAG, "Get data len= %zu, topic len=%zu, total_data: %d offset: %zu", msg_data_len, msg_topic_len,
+    ESP_LOGD(TAG, "Get data len= %"PRIu32", topic len=%"PRIu32", total_data: %d offset: %"PRIu32, msg_data_len, msg_topic_len,
              client->event.total_data_len, msg_data_offset);
     client->event.event_id = MQTT_EVENT_DATA;
     client->event.data = msg_data_len > 0 ? msg_data : NULL;
@@ -1220,7 +1220,7 @@ static int mqtt_message_receive(esp_mqtt_client_handle_t client, int read_poll_t
         } while ((client->mqtt_state.in_buffer_read_len < 6) && (*(buf - 1) & 0x80));
     }
     total_len = mqtt_get_total_length(client->mqtt_state.in_buffer, client->mqtt_state.in_buffer_read_len, &fixed_header_len);
-    ESP_LOGD(TAG, "%s: total message length: %d (already read: %zu)", __func__, total_len, client->mqtt_state.in_buffer_read_len);
+    ESP_LOGD(TAG, "%s: total message length: %d (already read: %"PRIu32")", __func__, total_len, client->mqtt_state.in_buffer_read_len);
     client->mqtt_state.message_length = total_len;
     if (client->mqtt_state.in_buffer_length < total_len) {
         if (mqtt_get_type(client->mqtt_state.in_buffer) == MQTT_MSG_TYPE_PUBLISH) {
@@ -1238,7 +1238,7 @@ static int mqtt_message_receive(esp_mqtt_client_handle_t client, int read_poll_t
                 client->mqtt_state.in_buffer_read_len += read_len;
                 buf += read_len;
                 if (client->mqtt_state.in_buffer_read_len < fixed_header_len + 2) {
-                    ESP_LOGD(TAG, "%s: transport_read(): message reading left in progress :: total message length: %d (already read: %zu)",
+                    ESP_LOGD(TAG, "%s: transport_read(): message reading left in progress :: total message length: %d (already read: %"PRIu32")",
                              __func__, total_len, client->mqtt_state.in_buffer_read_len);
                     return 0;
                 }
@@ -1268,12 +1268,12 @@ static int mqtt_message_receive(esp_mqtt_client_handle_t client, int read_poll_t
         }
         client->mqtt_state.in_buffer_read_len += read_len;
         if (client->mqtt_state.in_buffer_read_len < total_len) {
-            ESP_LOGD(TAG, "%s: transport_read(): message reading left in progress :: total message length: %d (already read: %zu)",
+            ESP_LOGD(TAG, "%s: transport_read(): message reading left in progress :: total message length: %d (already read: %"PRIu32")",
                      __func__, total_len, client->mqtt_state.in_buffer_read_len);
             return 0;
         }
     }
-    ESP_LOGD(TAG, "%s: transport_read():%zu %zu", __func__, client->mqtt_state.in_buffer_read_len, client->mqtt_state.message_length);
+    ESP_LOGD(TAG, "%s: transport_read():%"PRIu32" %"PRIu32, __func__, client->mqtt_state.in_buffer_read_len, client->mqtt_state.message_length);
     return 1;
 err:
     esp_mqtt_client_dispatch_transport_error(client);
@@ -1315,7 +1315,7 @@ static esp_err_t mqtt_process_receive(esp_mqtt_client_handle_t client)
 #ifdef MQTT_PROTOCOL_5
             esp_mqtt5_parse_suback(client);
 #endif
-            ESP_LOGD(TAG, "deliver_suback, message_length_read=%zu, message_length=%zu", client->mqtt_state.in_buffer_read_len, client->mqtt_state.message_length);
+            ESP_LOGD(TAG, "deliver_suback, message_length_read=%"PRIu32", message_length=%"PRIu32, client->mqtt_state.in_buffer_read_len, client->mqtt_state.message_length);
             if (deliver_suback(client) != ESP_OK) {
                 ESP_LOGE(TAG, "Failed to deliver suback message id=%d", msg_id);
                 return ESP_FAIL;
@@ -1333,7 +1333,7 @@ static esp_err_t mqtt_process_receive(esp_mqtt_client_handle_t client)
         }
         break;
     case MQTT_MSG_TYPE_PUBLISH:
-        ESP_LOGD(TAG, "deliver_publish, message_length_read=%zu, message_length=%zu", client->mqtt_state.in_buffer_read_len, client->mqtt_state.message_length);
+        ESP_LOGD(TAG, "deliver_publish, message_length_read=%"PRIu32", message_length=%"PRIu32, client->mqtt_state.in_buffer_read_len, client->mqtt_state.message_length);
         if (deliver_publish(client) != ESP_OK) {
             ESP_LOGE(TAG, "Failed to deliver publish message id=%d", msg_id);
             return ESP_FAIL;