diff --git a/src/models/entities/Permission.ts b/src/models/entities/Permission.ts
index 86f7d6a..d284489 100644
--- a/src/models/entities/Permission.ts
+++ b/src/models/entities/Permission.ts
@@ -22,24 +22,18 @@ export abstract class Permission {
    * The permissions principal
    */
   @ManyToOne(() => Principal, principal => principal.permissions)
-  principal: Principal[]
+  principal: Principal;
 
   /**
    * The target
    */
-  @Column({
-    type: 'simple-enum',
-    enum: PermissionTarget
-  })
+  @Column({ type: 'varchar' })
   @IsNotEmpty()
   target: PermissionTarget;
 
   /**
    * The action type
    */
-  @Column({
-    type: 'simple-enum',
-    enum: PermissionAction
-  })
+  @Column({ type: 'varchar' })
   action: PermissionAction;
 }
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