diff --git a/generate/swaggergen/g_docs.go b/generate/swaggergen/g_docs.go
index 512e01c..e8bb088 100644
--- a/generate/swaggergen/g_docs.go
+++ b/generate/swaggergen/g_docs.go
@@ -832,6 +832,7 @@ func setParamType(para *swagger.Parameter, typ string, pkgpath, controllerName s
 				Type:   paraType,
 				Format: paraFormat,
 			}
+			para.CollectionFormat = "multi"
 		}
 	} else {
 		para.Type = paraType
diff --git a/vendor/github.com/astaxie/beego/swagger/swagger.go b/vendor/github.com/astaxie/beego/swagger/swagger.go
index a55676c..c15b08e 100644
--- a/vendor/github.com/astaxie/beego/swagger/swagger.go
+++ b/vendor/github.com/astaxie/beego/swagger/swagger.go
@@ -98,6 +98,7 @@ type Parameter struct {
 	Type        string          `json:"type,omitempty" yaml:"type,omitempty"`
 	Format      string          `json:"format,omitempty" yaml:"format,omitempty"`
 	Items       *ParameterItems `json:"items,omitempty" yaml:"items,omitempty"`
+	CollectionFormat string     `json:"collectionFormat,omitempty" yaml:"collectionFormat,omitempty"`
 	Default     interface{}     `json:"default,omitempty" yaml:"default,omitempty"`
 }