diff --git a/src/main/scala/gitbucket/core/api/ApiRelease.scala b/src/main/scala/gitbucket/core/api/ApiRelease.scala
index d661235..c23c5ea 100644
--- a/src/main/scala/gitbucket/core/api/ApiRelease.scala
+++ b/src/main/scala/gitbucket/core/api/ApiRelease.scala
@@ -2,17 +2,17 @@
 import gitbucket.core.model.{Account, ReleaseAsset, ReleaseTag}
 import gitbucket.core.util.RepositoryName
 
-case class ApiReleaseAsset(name: String, size: Long)(asset: ReleaseAsset, repositoryName: RepositoryName) {
+case class ApiReleaseAsset(name: String, size: Long)(tag: String, fileName: String, repositoryName: RepositoryName) {
   val label = name
-  val file_id = asset.fileName
+  val file_id = fileName
   val browser_download_url = ApiPath(
-    s"/api/v3/repos/${repositoryName.fullName}/releases/${asset.tag}/assets/${asset.fileName}"
+    s"/api/v3/repos/${repositoryName.fullName}/releases/${tag}/assets/${fileName}"
   )
 }
 
 object ApiReleaseAsset {
   def apply(asset: ReleaseAsset, repositoryName: RepositoryName): ApiReleaseAsset =
-    ApiReleaseAsset(asset.label, asset.size)(asset, repositoryName)
+    ApiReleaseAsset(asset.label, asset.size)(asset.tag, asset.fileName, repositoryName)
 }
 
 case class ApiRelease(
diff --git a/src/test/scala/gitbucket/core/api/ApiSpecModels.scala b/src/test/scala/gitbucket/core/api/ApiSpecModels.scala
index 0b2cdac..4048422 100644
--- a/src/test/scala/gitbucket/core/api/ApiSpecModels.scala
+++ b/src/test/scala/gitbucket/core/api/ApiSpecModels.scala
@@ -388,6 +388,25 @@
     `object` = ApiObject(sha1)
   )
 
+  val assetFileName = "010203040a0b0c0d"
+
+  val apiReleaseAsset = ApiReleaseAsset(
+    name = "release.zip",
+    size = 100
+  )(
+    tag = "tag1",
+    fileName = assetFileName,
+    repositoryName = repo1Name
+  )
+
+  val apiRelease = ApiRelease(
+    name = "release1",
+    tag_name = "tag1",
+    body = Some("content"),
+    author = apiUser,
+    assets = Seq(apiReleaseAsset)
+  )
+
   // JSON String for APIs
 
   val jsonUser = """{
@@ -649,4 +668,21 @@
 
   val jsonRef = """{"ref":"refs/heads/featureA","object":{"sha":"6dcb09b5b57875f334f61aebed695e2e4193db5e"}}"""
 
+  val jsonReleaseAsset =
+    s"""{
+      |"name":"release.zip",
+      |"size":100,
+      |"label":"release.zip",
+      |"file_id":"${assetFileName}",
+      |"browser_download_url":"http://gitbucket.exmple.com/api/v3/repos/octocat/Hello-World/releases/tag1/assets/${assetFileName}"
+      |}""".stripMargin
+
+  val jsonRelease =
+    s"""{
+       |"name":"release1",
+       |"tag_name":"tag1",
+       |"body":"content",
+       |"author":${jsonUser},
+       |"assets":[${jsonReleaseAsset}]
+       |}""".stripMargin
 }
diff --git a/src/test/scala/gitbucket/core/api/JsonFormatSpec.scala b/src/test/scala/gitbucket/core/api/JsonFormatSpec.scala
index 0cf00cd..6a6ee26 100644
--- a/src/test/scala/gitbucket/core/api/JsonFormatSpec.scala
+++ b/src/test/scala/gitbucket/core/api/JsonFormatSpec.scala
@@ -73,4 +73,10 @@
   test("apiRef") {
     assert(JsonFormat(apiRef) == expected(jsonRef))
   }
+  test("apiReleaseAsset") {
+    assert(JsonFormat(apiReleaseAsset) == expected(jsonReleaseAsset))
+  }
+  test("apiRelease") {
+    assert(JsonFormat(apiRelease) == expected(jsonRelease))
+  }
 }