diff --git a/.github/auto-comment.yml b/.github/auto-comment.yml
index 0f5c529..3c25536 100644
--- a/.github/auto-comment.yml
+++ b/.github/auto-comment.yml
@@ -1,12 +1,21 @@
-# Comment to a new issue.
-issueOpened: >
-  Thank your for raising a issue. We will try and get back to you as soon as possible.
-  
-  Please make sure you have given us as much context as possible.
-
-
-pullRequestOpened: >
-  Thank your for raising your pull request.
-  
-  Please make sure you have followed our contributing guidelines. We will review it as soon as possible
-
+# Number of days of inactivity before an Issue or Pull Request becomes stale
+daysUntilStale: 90
+# Number of days of inactivity before a stale Issue or Pull Request is closed
+daysUntilClose: 30
+# Issues or Pull Requests with these labels will never be considered stale. Set to `[]` to disable
+exemptLabels:
+  - pinned
+  - security
+# Label to use when marking as stale
+staleLabel: stale
+# Comment to post when marking as stale. Set to `false` to disable
+markComment: >
+  This issue has been automatically marked as stale because it has not had
+  recent activity. It will be closed if no further activity occurs. Thank you
+  for your contributions.
+# Comment to post when removing the stale label. Set to `false` to disable
+unmarkComment: false
+# Comment to post when closing a stale Issue or Pull Request. Set to `false` to disable
+closeComment: true
+# Limit to only `issues` or `pulls`
+only: issues
diff --git a/.github/auto_assign.yml b/.github/auto_assign.yml
new file mode 100644
index 0000000..dffe542
--- /dev/null
+++ b/.github/auto_assign.yml
@@ -0,0 +1,30 @@
+# Set to true to add reviewers to pull requests
+addReviewers: true
+
+# Set to true to add assignees to pull requests
+addAssignees: author
+
+# A list of reviewers to be added to pull requests (GitHub user name)
+reviewers:
+  - Jonghakseo
+
+# A number of reviewers added to the pull request
+# Set 0 to add all the reviewers (default: 0)
+numberOfReviewers: 0
+
+# A list of assignees, overrides reviewers if set
+# assignees:
+#   - assigneeA
+
+# A number of assignees to add to the pull request
+# Set to 0 to add all of the assignees.
+# Uses numberOfReviewers if unset.
+# numberOfAssignees: 2
+
+# A list of keywords to be skipped the process that add reviewers if pull requests include it
+# skipKeywords:
+#   - wip
+
+filterLabels:
+  exclude:
+    - dependencies
diff --git a/.github/workflows/auto-assign.yml b/.github/workflows/auto-assign.yml
new file mode 100644
index 0000000..f4c725e
--- /dev/null
+++ b/.github/workflows/auto-assign.yml
@@ -0,0 +1,12 @@
+name: 'Auto Assign'
+on:
+  pull_request:
+    types: [opened, ready_for_review]
+
+jobs:
+  add-reviews:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: kentaro-m/auto-assign-action@v1.2.5
+        with:
+          configuration-path: '.github/auto_assign.yml'
diff --git a/.github/workflows/greetings.yml b/.github/workflows/greetings.yml
new file mode 100644
index 0000000..bdac30b
--- /dev/null
+++ b/.github/workflows/greetings.yml
@@ -0,0 +1,16 @@
+name: Greetings
+
+on: [pull_request_target, issues]
+
+jobs:
+  greeting:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
+    steps:
+    - uses: actions/first-interaction@v1
+      with:
+        repo-token: ${{ secrets.GITHUB_TOKEN }}
+        issue-message: 'Thank you for your contribution. We will check and reply to you as soon as possible.'
+        pr-message: 'Thank you for your contribution. We will check and reply to you as soon as possible.'