diff --git a/custom/src/main/java/org/gitnex/tea4j/v2/apis/custom/CustomApi.java b/custom/src/main/java/org/gitnex/tea4j/v2/apis/custom/CustomApi.java
index edd39ca..bc9349d 100644
--- a/custom/src/main/java/org/gitnex/tea4j/v2/apis/custom/CustomApi.java
+++ b/custom/src/main/java/org/gitnex/tea4j/v2/apis/custom/CustomApi.java
@@ -1,12 +1,10 @@
 package org.gitnex.tea4j.v2.apis.custom;
 
+import java.util.List;
 import org.gitnex.tea4j.v2.models.*;
-import okhttp3.ResponseBody;
 import retrofit2.Call;
 import retrofit2.http.*;
 
-import java.util.List;
-
 public interface CustomApi {
 
   @GET("repos/{owner}/{repo}/contents/{filepath}")
@@ -100,14 +98,14 @@ public interface CustomApi {
   @HTTP(method = "DELETE", path = "user/emails", hasBody = true)
   Call<Void> userDeleteEmailWithBody(@Body DeleteEmailOption body);
 
-      @Headers({"Content-Type:application/json"})
-    @GET("notifications")
-    Call<List<NotificationThread>> notifyGetList2(
-    @retrofit2.http.Query("all") Boolean all,
-    @retrofit2.http.Query("status-types") List<String> statusTypes,
-    @retrofit2.http.Query("subject-type") List<String> subjectType,
-    @retrofit2.http.Query("since") String since,
-    @retrofit2.http.Query("before") String before,
-    @retrofit2.http.Query("page") Integer page,
-    @retrofit2.http.Query("limit") Integer limit);
+  @Headers({"Content-Type:application/json"})
+  @GET("notifications")
+  Call<List<NotificationThread>> notifyGetList2(
+      @retrofit2.http.Query("all") Boolean all,
+      @retrofit2.http.Query("status-types") List<String> statusTypes,
+      @retrofit2.http.Query("subject-type") List<String> subjectType,
+      @retrofit2.http.Query("since") String since,
+      @retrofit2.http.Query("before") String before,
+      @retrofit2.http.Query("page") Integer page,
+      @retrofit2.http.Query("limit") Integer limit);
 }
diff --git a/custom/src/main/java/org/gitnex/tea4j/v2/apis/custom/WebApi.java b/custom/src/main/java/org/gitnex/tea4j/v2/apis/custom/WebApi.java
index 58d8dde..fa8d21a 100644
--- a/custom/src/main/java/org/gitnex/tea4j/v2/apis/custom/WebApi.java
+++ b/custom/src/main/java/org/gitnex/tea4j/v2/apis/custom/WebApi.java
@@ -3,7 +3,6 @@ package org.gitnex.tea4j.v2.apis.custom;
 import okhttp3.ResponseBody;
 import retrofit2.Call;
 import retrofit2.http.GET;
-import retrofit2.http.Header;
 import retrofit2.http.Path;
 import retrofit2.http.Streaming;
 
@@ -30,4 +29,9 @@ public interface WebApi {
           @Path("repo") String repo,
           @Path("sha") String sha,
           @Path("diffType") String diffType);
+
+  @Streaming
+  @GET("attachments/{hashid}")
+  Call<ResponseBody> getAttachment(
+    @Path("hashid") String hashid);
 }