diff --git a/main/http_post.c b/main/http_post.c
index a011e30..9a7f0b8 100644
--- a/main/http_post.c
+++ b/main/http_post.c
@@ -181,6 +181,7 @@ void http_client_task(void *pvParameters)
 		//char *post_data = "{\"canid\":257}";
 		//http_rest_with_url(frameBuf.topic, post_data);
 		http_rest_with_url(frameBuf.topic, json_string);
+		cJSON_free(json_string);
 	} // end while
 
 	// Never reach here