diff --git a/src/api/wishes.php b/src/api/wishes.php
index 565503ff..3875d66d 100644
--- a/src/api/wishes.php
+++ b/src/api/wishes.php
@@ -259,7 +259,7 @@ switch ($_SERVER['REQUEST_METHOD']) {
         break;
 
     case 'PUT':
-        parse_str(file_get_contents("php://input"), $_PUT);
+        parse_str(file_get_contents('php://input'), $_PUT);
 
         if (isset($_PUT['wish_id'], $_PUT['wish_status'])) {
             /**
@@ -294,7 +294,7 @@ switch ($_SERVER['REQUEST_METHOD']) {
         break;
 
     case 'DELETE':
-        parse_str(file_get_contents("php://input"), $_DELETE);
+        parse_str(file_get_contents('php://input'), $_DELETE);
 
         if (isset($_DELETE['wish_id'])) {
             $database->query(
diff --git a/src/api/wishlists.php b/src/api/wishlists.php
index ec3819fc..f0acf0a1 100644
--- a/src/api/wishlists.php
+++ b/src/api/wishlists.php
@@ -152,7 +152,7 @@ switch ($_SERVER['REQUEST_METHOD']) {
         break;
 
     case 'PUT':
-        parse_str(file_get_contents("php://input"), $_PUT);
+        parse_str(file_get_contents('php://input'), $_PUT);
 
         $database
         ->query(
@@ -165,7 +165,7 @@ switch ($_SERVER['REQUEST_METHOD']) {
         break;
 
     case 'DELETE':
-        parse_str(file_get_contents("php://input"), $_DELETE);
+        parse_str(file_get_contents('php://input'), $_DELETE);
 
         $database->query(
             'DELETE FROM `wishlists`
diff --git a/src/classes/api.php b/src/classes/api.php
index 9bddb738..2ff156fd 100644
--- a/src/classes/api.php
+++ b/src/classes/api.php
@@ -61,7 +61,7 @@ class API
                 break;
 
             default:
-                parse_str(file_get_contents("php://input"), $_INPUT);
+                parse_str(file_get_contents('php://input'), $_INPUT);
 
                 $request_variables = array_merge($request_variables, $_INPUT);
                 break;