diff --git a/app/src/main/java/org/ktachibana/cloudemoji/Constants.java b/app/src/main/java/org/ktachibana/cloudemoji/Constants.java
index 0df82489..734a1aec 100755
--- a/app/src/main/java/org/ktachibana/cloudemoji/Constants.java
+++ b/app/src/main/java/org/ktachibana/cloudemoji/Constants.java
@@ -25,7 +25,6 @@ public interface Constants {
     String PREF_BACKUP_FAV = "pref_backup_fav";
     String PREF_RESTORE_FAV = "pref_restore_fav";
     String PREF_IMPORT_IME = "pref_import_into_ime";
-    String PREF_REVOKE_IME = "pref_revoke_from_ime";
     String PREF_BEHAVIORS = "pref_behaviors";
     String PREF_NOW_ON_TAP = "pref_now_on_tap";
 
@@ -44,6 +43,7 @@ public interface Constants {
     String STORE_URL = "http://emoticon.moe/store.json";
     String UPDATE_CHECKER_URL = "http://ktachibana.party/cloudemoticon/version.json";
     String PLAY_STORE_URL = "https://play.google.com/store/apps/details?id=org.ktachibana.cloudemoji";
+    String REPO_STORE_CONTRIBUTION_URL = "https://github.com/cloud-emoticon/store-repos/blob/master/CONTRIBUTING.md";
 
     // Intent
     int REPOSITORY_MANAGER_REQUEST_CODE = 0;
diff --git a/app/src/main/java/org/ktachibana/cloudemoji/activities/RepositoryStoreActivity.java b/app/src/main/java/org/ktachibana/cloudemoji/activities/RepositoryStoreActivity.java
index c6ce49f8..f51b5135 100644
--- a/app/src/main/java/org/ktachibana/cloudemoji/activities/RepositoryStoreActivity.java
+++ b/app/src/main/java/org/ktachibana/cloudemoji/activities/RepositoryStoreActivity.java
@@ -1,13 +1,18 @@
 package org.ktachibana.cloudemoji.activities;
 
+import android.content.Intent;
+import android.net.Uri;
 import android.os.Bundle;
+import android.view.View;
 import android.widget.ListView;
+import android.widget.TextView;
 
 import com.afollestad.materialdialogs.MaterialDialog;
 
 import org.greenrobot.eventbus.Subscribe;
 import org.ktachibana.cloudemoji.BaseActivity;
 import org.ktachibana.cloudemoji.BaseHttpClient;
+import org.ktachibana.cloudemoji.Constants;
 import org.ktachibana.cloudemoji.R;
 import org.ktachibana.cloudemoji.adapters.RepositoryStoreListViewAdapter;
 import org.ktachibana.cloudemoji.events.RepositoryAddedEvent;
@@ -26,6 +31,8 @@ public class RepositoryStoreActivity extends BaseActivity {
     private static final String STATE_TAG = "state";
     @Bind(R.id.list)
     ListView mList;
+    @Bind(R.id.contribution_prompt)
+    TextView mContributionPrompt;
     private List<StoreRepository> mRepositories;
 
     @Override
@@ -64,6 +71,26 @@ public void finish() {
                         dialog.dismiss();
                     }
                 });
+
+        mContributionPrompt.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                new MaterialDialog.Builder(RepositoryStoreActivity.this)
+                        .title(getString(R.string.repository_store_contribution_prompt))
+                        .content(getString(R.string.repository_store_contribution_warning))
+                        .positiveText(getString(R.string.proceed))
+                        .negativeText(android.R.string.cancel)
+                        .callback(new MaterialDialog.ButtonCallback() {
+                            @Override
+                            public void onPositive(MaterialDialog dialog) {
+                                Intent intent = new Intent();
+                                intent.setData(Uri.parse(Constants.REPO_STORE_CONTRIBUTION_URL));
+                                startActivity(intent);
+                            }
+                        })
+                        .show();
+            }
+        });
     }
 
     @Override
diff --git a/app/src/main/res/layout/activity_repository_store.xml b/app/src/main/res/layout/activity_repository_store.xml
index 9c6d5427..c1f19e43 100644
--- a/app/src/main/res/layout/activity_repository_store.xml
+++ b/app/src/main/res/layout/activity_repository_store.xml
@@ -6,12 +6,13 @@
     tools:context="org.ktachibana.cloudemoji.activities.RepositoryStoreActivity">
 
     <TextView
+        android:id="@+id/contribution_prompt"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:textSize="20sp"
+        android:text="@string/repository_store_contribution_prompt"
         android:textColor="@color/material_blue_500"
-        android:textStyle="italic"
-        android:text="@string/repository_store_contribution_prompt" />
+        android:textSize="20sp"
+        android:textStyle="italic" />
 
     <ListView
         android:layout_width="match_parent"
diff --git a/app/src/main/res/values-ja/strings.xml b/app/src/main/res/values-ja/strings.xml
index 9920e273..04027e73 100644
--- a/app/src/main/res/values-ja/strings.xml
+++ b/app/src/main/res/values-ja/strings.xml
@@ -79,4 +79,6 @@
     <string name="cool_kid">Hey running debug/beta versions, cool kid?</string>
     <string name="loading_repository_store">Loading repository store…</string>
     <string name="repository_store_contribution_prompt">Want to contribute?</string>
+    <string name="repository_store_contribution_warning">It is assumed that you have some minimal knowledge on GitHub, JSON and programming. Do you still want to proceed?</string>
+    <string name="proceed">Proceed</string>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values-zh/strings.xml b/app/src/main/res/values-zh/strings.xml
index 5b2414ea..49ca96cc 100755
--- a/app/src/main/res/values-zh/strings.xml
+++ b/app/src/main/res/values-zh/strings.xml
@@ -80,4 +80,6 @@
     <string name="cool_kid">在跑调试/测试版, 屌屌哒!</string>
     <string name="loading_repository_store">读取源商店中…</string>
     <string name="repository_store_contribution_prompt">想要贡献源吗？</string>
+    <string name="repository_store_contribution_warning">这需要最基础的 GitHub, JSON 以及编程知识。你确定要继续吗？</string>
+    <string name="proceed">继续</string>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 91ee1048..dc3d10a0 100755
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -81,4 +81,6 @@
     <string name="cool_kid">Hey running debug/beta versions, cool kid?</string>
     <string name="loading_repository_store">Loading repository store…</string>
     <string name="repository_store_contribution_prompt">Want to contribute?</string>
+    <string name="repository_store_contribution_warning">It is assumed that you have some minimal knowledge on GitHub, JSON and programming. Do you still want to proceed?</string>
+    <string name="proceed">Proceed</string>
 </resources>
\ No newline at end of file