diff --git a/.circleci/config.yml b/.circleci/config.yml
index 9f264a8a..cc423b5f 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -8,6 +8,11 @@ jobs:
         GO111MODULE: "on"
     steps:
       - checkout
+      - run:
+          name: merge base branch
+          command: |
+            git remote add goccy https://github.com/goccy/go-yaml.git
+            git pull goccy master
       - run:
           name: Download modules
           command: |