diff --git a/model/application.go b/model/application.go
index 180e866..d8c9e12 100644
--- a/model/application.go
+++ b/model/application.go
@@ -17,7 +17,7 @@ type Application struct {
 	// read only: true
 	// required: true
 	// example: AWH0wZ5r0Mbac.r
-	Token  string `gorm:"unique_index" json:"token"`
+	Token  string `gorm:"type:varchar(180);unique_index" json:"token"`
 	UserID uint   `gorm:"index" json:"-"`
 	// The application name. This is how the application should be displayed to the user.
 	//
diff --git a/model/client.go b/model/client.go
index 4766504..b378190 100644
--- a/model/client.go
+++ b/model/client.go
@@ -17,7 +17,7 @@ type Client struct {
 	// read only: true
 	// required: true
 	// example: CWH0wZ5r0Mbac.r
-	Token  string `gorm:"unique_index" json:"token"`
+	Token  string `gorm:"type:varchar(180);unique_index" json:"token"`
 	UserID uint   `gorm:"index" json:"-"`
 	// The client name. This is how the client should be displayed to the user.
 	//
diff --git a/model/pluginconf.go b/model/pluginconf.go
index 8aa0133..a5d2b6a 100644
--- a/model/pluginconf.go
+++ b/model/pluginconf.go
@@ -5,7 +5,7 @@ type PluginConf struct {
 	ID            uint `gorm:"primary_key;AUTO_INCREMENT;index"`
 	UserID        uint
 	ModulePath    string `gorm:"type:text"`
-	Token         string `gorm:"unique_index"`
+	Token         string `gorm:"type:varchar(180);unique_index"`
 	ApplicationID uint
 	Enabled       bool
 	Config        []byte
diff --git a/model/user.go b/model/user.go
index 39cfc3e..308dd05 100644
--- a/model/user.go
+++ b/model/user.go
@@ -3,7 +3,7 @@ package model
 // The User holds information about the credentials of a user and its application and client tokens.
 type User struct {
 	ID           uint   `gorm:"primary_key;unique_index;AUTO_INCREMENT"`
-	Name         string `gorm:"unique_index"`
+	Name         string `gorm:"type:varchar(180);unique_index"`
 	Pass         []byte
 	Admin        bool
 	Applications []Application