diff --git a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/rest/TbHttpClient.java b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/rest/TbHttpClient.java
index 4830761110..104e477346 100644
--- a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/rest/TbHttpClient.java
+++ b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/rest/TbHttpClient.java
@@ -132,7 +132,8 @@ public class TbHttpClient {
             this.webClient = WebClient.builder()
                     .clientConnector(new ReactorClientHttpConnector(httpClient))
                     .defaultHeader(HttpHeaders.CONNECTION, "close") //In previous realization this header was present! (Added for hotfix "Connection reset")
-                    .codecs(configurer -> configurer.defaultCodecs().maxInMemorySize(config.getMaxInMemoryBufferSizeInKb() * 1024))
+                    .codecs(configurer -> configurer.defaultCodecs().maxInMemorySize(
+                            (config.getMaxInMemoryBufferSizeInKb() > 0 ? config.getMaxInMemoryBufferSizeInKb() : 256) * 1024))
                     .build();
         } catch (SSLException e) {
             throw new TbNodeException(e);