diff --git a/.travis.yml b/.travis.yml
index 62bdd029d9d69ff1a0627e1e3a2da3d47ac2e19c..613173d7270c5cb47ea6390e6d58bb750260e20c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -24,6 +24,7 @@ after_success:
   - git checkout -b release
   - cp -f .gitignore-release .gitignore
   - git add --all
+  - git rm --cached -r ./
   - git config --global user.email "AyaMorisawa4869@gmail.com"
   - git config --global user.name "Aya Morisawa"
   - git commit -m "Release build for $TRAVIS_COMMIT"