diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 7178421..d7234da 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,5 +1,7 @@
 # Guideline for Issues
 
 - If you have any question about GitBucket, send it to [gitter room](https://gitter.im/gitbucket/gitbucket) before raise an issue.
+- Make sure check whether there is a same question or request in the past.
 - When raise a new issue, write subject in **English** at least.
 - We can also support in Japaneses other than English at [gitter room for Japanese](https://gitter.im/gitbucket/gitbucket_ja).
+- First priority of GitBucket is easy installation and reproduce GitHub behavior, so we might reject if your request is against it.
diff --git a/README.md b/README.md
index 4dffe6f..e111e68 100644
--- a/README.md
+++ b/README.md
@@ -88,8 +88,10 @@
 --------
 
 - If you have any question about GitBucket, send it to [gitter room](https://gitter.im/gitbucket/gitbucket) before raise an issue.
+- Make sure check whether there is a same question or request in the past.
 - When raise a new issue, write subject in **English** at least.
 - We can also support in Japaneses other than English at [gitter room for Japanese](https://gitter.im/gitbucket/gitbucket_ja).
+- First priority of GitBucket is easy installation and reproduce GitHub behavior, so we might reject if your request is against it.
 
 Release Notes
 --------