diff --git a/shopping-crawler/src/main/java/com/myoa/engineering/crawl/shopping/event/handler/ArticleUpsertEventListener.java b/shopping-crawler/src/main/java/com/myoa/engineering/crawl/shopping/event/handler/ArticleUpsertEventListener.java
index a241f67..924353a 100644
--- a/shopping-crawler/src/main/java/com/myoa/engineering/crawl/shopping/event/handler/ArticleUpsertEventListener.java
+++ b/shopping-crawler/src/main/java/com/myoa/engineering/crawl/shopping/event/handler/ArticleUpsertEventListener.java
@@ -18,7 +18,6 @@ import org.springframework.stereotype.Component;
 
 import java.util.List;
 import java.util.Map;
-import java.util.function.Function;
 import java.util.stream.Collectors;
 
 @Component
@@ -68,11 +67,6 @@ public class ArticleUpsertEventListener {
                 .forEach(this::notifyMessage);
     }
 
-    private Function<SubscribedKeywordAggregatedModel, List<ArticleModel>> doAhoCorasick(
-            List<ArticleModel> articles) {
-        return userTrieModel -> doAhocorasick(articles, userTrieModel);
-    }
-
     private List<ArticleModel> doAhocorasick(List<ArticleModel> articles,
                                              SubscribedKeywordAggregatedModel trieModel) {
         if (articles == null || articles.isEmpty()) {
diff --git a/shopping-crawler/src/main/java/com/myoa/engineering/crawl/shopping/util/SlackMessageUtils.java b/shopping-crawler/src/main/java/com/myoa/engineering/crawl/shopping/util/SlackMessageUtils.java
index 6aff796..963ea39 100644
--- a/shopping-crawler/src/main/java/com/myoa/engineering/crawl/shopping/util/SlackMessageUtils.java
+++ b/shopping-crawler/src/main/java/com/myoa/engineering/crawl/shopping/util/SlackMessageUtils.java
@@ -3,6 +3,7 @@ package com.myoa.engineering.crawl.shopping.util;
 import com.slack.api.model.block.DividerBlock;
 import com.slack.api.model.block.HeaderBlock;
 import com.slack.api.model.block.SectionBlock;
+import com.slack.api.model.block.composition.MarkdownTextObject;
 import com.slack.api.model.block.composition.PlainTextObject;
 
 public final class SlackMessageUtils {
@@ -24,9 +25,9 @@ public final class SlackMessageUtils {
 
     public static SectionBlock ofSection(String message) {
         return SectionBlock.builder()
-                           .text(PlainTextObject.builder()
-                                                .text(message)
-                                                .build())
+                           .text(MarkdownTextObject.builder()
+                                                   .text(message)
+                                                   .build())
                            .build();
     }
 }