diff --git a/.github/workflows/articles_branch_ci.yaml b/.github/workflows/articles_branch_ci.yaml
index 8b3643e..efbf17e 100644
--- a/.github/workflows/articles_branch_ci.yaml
+++ b/.github/workflows/articles_branch_ci.yaml
@@ -78,6 +78,7 @@ jobs:
           aws s3 --endpoint-url=https://minio.k8s.word-ac.net cp ./main.pdf s3://article-bucket/$REPO_NAME-$ARTICLE_NAME.pdf
 
       - name: Notify Slack
+        continue-on-error: true # 失敗しても良い
         if: always()
         run: ./scripts/notify_slack.sh
         env:
diff --git a/.github/workflows/master_branch_ci.yaml b/.github/workflows/master_branch_ci.yaml
index fed7ad6..9a1bc2b 100644
--- a/.github/workflows/master_branch_ci.yaml
+++ b/.github/workflows/master_branch_ci.yaml
@@ -55,6 +55,7 @@ jobs:
           aws s3 --endpoint-url=https://minio.k8s.word-ac.net cp ./main.pdf s3://article-bucket/$REPO_NAME.pdf
 
       - name: Notify Slack
+        continue-on-error: true # 失敗しても良い
         if: always()
         run: ./scripts/notify_slack.sh
         env: