diff --git a/packages/server/src/controllers/FilesController/index.js b/packages/server/src/controllers/FilesController/index.js
index f40af947..515d7df2 100644
--- a/packages/server/src/controllers/FilesController/index.js
+++ b/packages/server/src/controllers/FilesController/index.js
@@ -8,7 +8,7 @@ function resolveToUrl(filepath) {
 }
 
 export default class FilesController extends ComplexController {
-    static refName = "FilesController"
+    static disabled = true
 
     get = {
         "/uploads/:id": {
diff --git a/packages/server/src/controllers/RolesController/index.js b/packages/server/src/controllers/RolesController/index.js
index d00dbed7..2bb35f79 100644
--- a/packages/server/src/controllers/RolesController/index.js
+++ b/packages/server/src/controllers/RolesController/index.js
@@ -61,11 +61,11 @@ export default class RolesController extends ComplexController {
             }, async (req, res) => {
                 // check if issuer user is admin
                 if (!req.isAdmin()) {
-                    return res.status(403).send("You do not have administrator permission")
+                    return res.status(403).json("You do not have administrator permission")
                 }
 
                 if (!Array.isArray(req.selection.update)) {
-                    return res.status(400).send("Invalid update request")
+                    return res.status(400).json("Invalid update request")
                 }
 
                 req.selection.update.forEach(async (update) => {
@@ -82,7 +82,7 @@ export default class RolesController extends ComplexController {
                     }
                 })
 
-                return res.send("done")
+                return res.json("done")
             }),
         },
     }
diff --git a/packages/server/src/controllers/SessionController/index.js b/packages/server/src/controllers/SessionController/index.js
index 7cfee5b0..46560671 100644
--- a/packages/server/src/controllers/SessionController/index.js
+++ b/packages/server/src/controllers/SessionController/index.js
@@ -75,18 +75,18 @@ export default class SessionController extends ComplexController {
                 const { token, user_id } = req.body
 
                 if (typeof user_id === "undefined") {
-                    return res.status(400).send("No user_id provided")
+                    return res.status(400).json("No user_id provided")
                 }
                 if (typeof token === "undefined") {
-                    return res.status(400).send("No token provided")
+                    return res.status(400).json("No token provided")
                 }
 
                 const session = await Session.findOneAndDelete({ user_id, token })
                 if (session) {
-                    return res.send("done")
+                    return res.json("done")
                 }
 
-                return res.status(404).send("not found")
+                return res.status(404).json("not found")
             },
         },
         "/sessions": {
@@ -95,15 +95,15 @@ export default class SessionController extends ComplexController {
                 const { user_id } = req.body
 
                 if (typeof user_id === "undefined") {
-                    return res.status(400).send("No user_id provided")
+                    return res.status(400).json("No user_id provided")
                 }
 
                 const allSessions = await Session.deleteMany({ user_id })
                 if (allSessions) {
-                    return res.send("done")
+                    return res.json("done")
                 }
 
-                return res.status(404).send("not found")
+                return res.status(404).json("not found")
             }
         },
     }
diff --git a/packages/server/src/controllers/UserController/index.js b/packages/server/src/controllers/UserController/index.js
index 85cc994d..cd42cbaf 100644
--- a/packages/server/src/controllers/UserController/index.js
+++ b/packages/server/src/controllers/UserController/index.js
@@ -390,7 +390,7 @@ export default class UserController extends ComplexController {
                     })
                 })
                     .catch((err) => {
-                        return res.send(500).json({
+                        return res.json(500).json({
                             error: err.message
                         })
                     })
@@ -420,7 +420,7 @@ export default class UserController extends ComplexController {
                     })
                 })
                     .catch((err) => {
-                        return res.send(500).json({
+                        return res.json(500).json({
                             error: err.message
                         })
                     })
diff --git a/packages/server/src/middlewares/onlyAdmin/index.js b/packages/server/src/middlewares/onlyAdmin/index.js
index 1bac1ead..730faba8 100644
--- a/packages/server/src/middlewares/onlyAdmin/index.js
+++ b/packages/server/src/middlewares/onlyAdmin/index.js
@@ -1,6 +1,6 @@
 export default (req, res, next) => {
     if (!req.user.roles.includes("admin")) {
-        return res.status(403).send({ error: "To make this request it is necessary to have administrator permissions" })
+        return res.status(403).json({ error: "To make this request it is necessary to have administrator permissions" })
     }
 
     next()
diff --git a/packages/server/src/middlewares/withAuthentication/index.js b/packages/server/src/middlewares/withAuthentication/index.js
index 71509706..4c1f7d52 100644
--- a/packages/server/src/middlewares/withAuthentication/index.js
+++ b/packages/server/src/middlewares/withAuthentication/index.js
@@ -4,7 +4,7 @@ import jwt from "jsonwebtoken"
 
 export default (req, res, next) => {
     function reject(description) {
-        return res.status(401).send({ error: `${description ?? "Invalid session"}` })
+        return res.status(401).json({ error: `${description ?? "Invalid session"}` })
     }
 
     const authHeader = req.headers?.authorization?.split(" ")
@@ -34,7 +34,7 @@ export default (req, res, next) => {
             const userData = await User.findOne({ _id: currentSession.user_id }).select("+refreshToken")
 
             if (!userData) {
-                return res.status(404).send({ error: "No user data found" })
+                return res.status(404).json({ error: "No user data found" })
             }
 
             if (err) {