diff --git a/modules/structs/repo.go b/modules/structs/repo.go
index abc8076387..aca5d9c3f4 100644
--- a/modules/structs/repo.go
+++ b/modules/structs/repo.go
@@ -57,7 +57,7 @@ type Repository struct {
 	Private       bool        `json:"private"`
 	Fork          bool        `json:"fork"`
 	Template      bool        `json:"template"`
-	Parent        *Repository `json:"parent"`
+	Parent        *Repository `json:"parent,omitempty"`
 	Mirror        bool        `json:"mirror"`
 	Size          int         `json:"size"`
 	Language      string      `json:"language"`
@@ -114,7 +114,7 @@ type Repository struct {
 	ObjectFormatName string `json:"object_format_name"`
 	// swagger:strfmt date-time
 	MirrorUpdated time.Time     `json:"mirror_updated"`
-	RepoTransfer  *RepoTransfer `json:"repo_transfer"`
+	RepoTransfer  *RepoTransfer `json:"repo_transfer,omitempty"`
 	Topics        []string      `json:"topics"`
 	Licenses      []string      `json:"licenses"`
 }
diff --git a/routers/api/v1/repo/action.go b/routers/api/v1/repo/action.go
index a57db015f0..ef0c5cc199 100644
--- a/routers/api/v1/repo/action.go
+++ b/routers/api/v1/repo/action.go
@@ -747,7 +747,7 @@ func (Action) ListWorkflowRuns(ctx *context.APIContext) {
 	//   type: integer
 	// responses:
 	//   "200":
-	//     "$ref": "#/responses/ArtifactsList"
+	//     "$ref": "#/responses/WorkflowRunsList"
 	//   "400":
 	//     "$ref": "#/responses/error"
 	//   "404":
diff --git a/services/convert/repository.go b/services/convert/repository.go
index 614eb58a88..a364591bb8 100644
--- a/services/convert/repository.go
+++ b/services/convert/repository.go
@@ -251,7 +251,7 @@ func innerToRepo(ctx context.Context, repo *repo_model.Repository, permissionInR
 		RepoTransfer:                  transfer,
 		Topics:                        util.SliceNilAsEmpty(repo.Topics),
 		ObjectFormatName:              repo.ObjectFormatName,
-		Licenses:                      repoLicenses.StringList(),
+		Licenses:                      util.SliceNilAsEmpty(repoLicenses.StringList()),
 	}
 }
 
diff --git a/templates/swagger/v1_json.tmpl b/templates/swagger/v1_json.tmpl
index 6cf2810baf..323e0d64ac 100644
--- a/templates/swagger/v1_json.tmpl
+++ b/templates/swagger/v1_json.tmpl
@@ -5165,7 +5165,7 @@
         ],
         "responses": {
           "200": {
-            "$ref": "#/responses/ArtifactsList"
+            "$ref": "#/responses/WorkflowRunsList"
           },
           "400": {
             "$ref": "#/responses/error"