diff --git a/modules/ticket/back/methods/sale/updatePrice.js b/modules/ticket/back/methods/sale/updatePrice.js
index dd6d64c59..007e17954 100644
--- a/modules/ticket/back/methods/sale/updatePrice.js
+++ b/modules/ticket/back/methods/sale/updatePrice.js
@@ -29,7 +29,7 @@ module.exports = Self => {
     });
 
     Self.updatePrice = async(id, newPrice) => {
-        let $ = Self.app.models;
+        let models = Self.app.models;
         let transaction = await Self.beginTransaction({});
         let options = {transaction};
 
@@ -49,17 +49,17 @@ module.exports = Self => {
                     }
                 }
             };
-            let sale = await $.Sale.findById(id, filter, options);
+            let sale = await models.Sale.findById(id, filter, options);
 
-            let isEditable = await $.Ticket.isEditable(sale.ticketFk);
+            let isEditable = await models.Ticket.isEditable(sale.ticketFk);
             if (!isEditable)
                 throw new UserError(`The sales of this ticket can't be modified`);
 
             let salesPerson = sale.ticket().client().salesPersonFk;
-            let usesMana = await $.WorkerMana.findOne({where: {workerFk: salesPerson}, fields: 'amount'}, options);
+            let usesMana = await models.WorkerMana.findOne({where: {workerFk: salesPerson}, fields: 'amount'}, options);
             let componentCode = usesMana ? 'mana' : 'buyerDiscount';
 
-            let discount = await $.ComponentRate.findOne({where: {code: componentCode}}, options);
+            let discount = await models.ComponentRate.findOne({where: {code: componentCode}}, options);
             let componentId = discount.id;
             let componentValue = newPrice - sale.price;
 
@@ -67,14 +67,14 @@ module.exports = Self => {
                 componentFk: componentId,
                 saleFk: id
             };
-            let saleComponent = await $.SaleComponent.findOne({where}, options);
+            let saleComponent = await models.SaleComponent.findOne({where}, options);
 
             if (saleComponent) {
-                await $.SaleComponent.updateAll(where, {
+                await models.SaleComponent.updateAll(where, {
                     value: saleComponent.value + componentValue
                 }, options);
             } else {
-                await $.SaleComponent.create({
+                await models.SaleComponent.create({
                     saleFk: id,
                     componentFk: componentId,
                     value: componentValue
diff --git a/modules/ticket/back/methods/ticket-tracking/changeState.js b/modules/ticket/back/methods/ticket-tracking/changeState.js
index f70ae93a5..9a4c63ece 100644
--- a/modules/ticket/back/methods/ticket-tracking/changeState.js
+++ b/modules/ticket/back/methods/ticket-tracking/changeState.js
@@ -25,26 +25,26 @@ module.exports = Self => {
 
     Self.changeState = async(ctx, params) => {
         let userId = ctx.req.accessToken.userId;
-        let $ = Self.app.models;
+        let models = Self.app.models;
 
         if (!params.stateFk && !params.code)
             throw new UserError('State cannot be blank');
 
         if (params.code) {
-            let state = await $.State.findOne({where: {code: params.code}, fields: ['id']});
+            let state = await models.State.findOne({where: {code: params.code}, fields: ['id']});
             params.stateFk = state.id;
         }
 
-        let isProduction = await $.Account.hasRole(userId, 'production');
-        let isSalesPerson = await $.Account.hasRole(userId, 'salesPerson');
+        let isProduction = await models.Account.hasRole(userId, 'production');
+        let isSalesPerson = await models.Account.hasRole(userId, 'salesPerson');
 
-        let ticket = await $.TicketState.findById(
+        let ticket = await models.TicketState.findById(
             params.ticketFk,
             {fields: ['stateFk']}
         );
 
-        let oldState = await $.State.findById(ticket.stateFk);
-        let newState = await $.State.findById(params.stateFk);
+        let oldState = await models.State.findById(ticket.stateFk);
+        let newState = await models.State.findById(params.stateFk);
 
         let isAllowed = isProduction || isSalesPerson
             && oldState.isEditable()
@@ -54,10 +54,10 @@ module.exports = Self => {
             throw new UserError(`You don't have enough privileges`, 'ACCESS_DENIED');
 
         if (newState.code != 'PICKER_DESIGNED') {
-            let worker = await $.Worker.findOne({where: {userFk: userId}});
+            let worker = await models.Worker.findOne({where: {userFk: userId}});
             params.workerFk = worker.id;
         }
 
-        return await $.TicketTracking.create(params);
+        return await models.TicketTracking.create(params);
     };
 };
diff --git a/modules/ticket/back/methods/ticket/makeInvoice.js b/modules/ticket/back/methods/ticket/makeInvoice.js
index 1bc514990..cbfe8e531 100644
--- a/modules/ticket/back/methods/ticket/makeInvoice.js
+++ b/modules/ticket/back/methods/ticket/makeInvoice.js
@@ -26,19 +26,19 @@ module.exports = function(Self) {
 
     Self.makeInvoice = async(ctx, id) => {
         let userId = ctx.req.accessToken.userId;
-        let $ = Self.app.models;
+        let models = Self.app.models;
 
         let options = {};
         options.transaction = await Self.beginTransaction({});
 
         try {
-            let ticket = await $.Ticket.findById(id, {fields: ['id', 'clientFk', 'companyFk']});
+            let ticket = await models.Ticket.findById(id, {fields: ['id', 'clientFk', 'companyFk']});
 
-            let clientCanBeInvoiced = await $.Client.canBeInvoiced(ticket.clientFk);
+            let clientCanBeInvoiced = await models.Client.canBeInvoiced(ticket.clientFk);
             if (!clientCanBeInvoiced)
                 throw new UserError(`This client can't be invoiced`);
 
-            let ticketCanBeInvoiced = await $.Ticket.canBeInvoiced(ticket.id);
+            let ticketCanBeInvoiced = await models.Ticket.canBeInvoiced(ticket.id);
             if (!ticketCanBeInvoiced)
                 throw new UserError(`This ticket can't be invoiced`);