Update stuff

models/malware.js

@@ -3,13 +3,11 @@ export default function (sequelize, DataTypes) {
     fileId: { type: DataTypes.STRING(12), primaryKey: true }, // eslint-disable-line new-cap
     positives: DataTypes.INTEGER,
     virustotal: DataTypes.JSON,
-  }, {
-    classMethods: {
-      associate: (models) => {
-        Malware.belongsTo(models.file);
-      },
-    },
   });
 
+  Malware.associate = function associate(models) {
+    Malware.belongsTo(models.file);
+  };
+
   return Malware;
 }