diff --git a/package-lock.json b/package-lock.json
index 40fa25d..a1bd5f6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "ewelink-api",
-  "version": "3.1.0",
+  "version": "3.1.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 5db511f..5828b4c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ewelink-api",
-  "version": "3.1.0",
+  "version": "3.1.1",
   "description": "eWeLink API for Node.js",
   "author": "Martín M.",
   "license": "MIT",
diff --git a/src/data/errors.js b/src/data/errors.js
index ea73a5b..60030a6 100644
--- a/src/data/errors.js
+++ b/src/data/errors.js
@@ -5,6 +5,7 @@ const errors = {
   403: 'Forbidden',
   404: 'Device does not exist',
   406: 'Authentication failed',
+  503: 'Service Temporarily Unavailable or Device is offline'
 };
 
 const customErrors = {
diff --git a/src/mixins/makeRequest.js b/src/mixins/makeRequest.js
index 1e4e0ad..e371b90 100644
--- a/src/mixins/makeRequest.js
+++ b/src/mixins/makeRequest.js
@@ -42,14 +42,13 @@ module.exports = {
     const requestUrl = `${apiUrl}${uri}${queryString}`;
 
     const request = await fetch(requestUrl, payload);
-    const response = await request.json();
 
-    const error = _get(response, 'error', false);
-
-    if (error) {
-      return { error, msg: errors[error] };
+    if (!request.ok) {
+      return { error: request.status, msg: errors[request.status] };
     }
 
-    return response;
+    const response = await request.json();
+
+    return response
   },
 };