diff --git a/addons/website_slides/models/slides.py b/addons/website_slides/models/slides.py
index dc67ea0de78..a4de9105a1c 100644
--- a/addons/website_slides/models/slides.py
+++ b/addons/website_slides/models/slides.py
@@ -499,13 +499,12 @@ class Slide(models.Model):
         try:
             response = requests.get(base_url, params=data)
             response.raise_for_status()
-            content = response.content
             if content_type == 'json':
-                result['values'] = json.loads(content)
+                result['values'] = response.json()
             elif content_type in ('image', 'pdf'):
-                result['values'] = base64.b64encode(content)
+                result['values'] = base64.b64encode(response.content)
             else:
-                result['values'] = content
+                result['values'] = response.content
         except requests.exceptions.HTTPError as e:
             result['error'] = e.response.content
         except requests.exceptions.ConnectionError as e:
diff --git a/odoo/addons/test_impex/tests/test_load.py b/odoo/addons/test_impex/tests/test_load.py
index d8c7e3d87d5..15331174d53 100644
--- a/odoo/addons/test_impex/tests/test_load.py
+++ b/odoo/addons/test_impex/tests/test_load.py
@@ -965,7 +965,7 @@ class test_o2m_multiple(ImporterCase):
 
 class test_realworld(common.TransactionCase):
     def test_bigfile(self):
-        data = json.loads(pkgutil.get_data(self.__module__, 'contacts_big.json'))
+        data = json.loads(pkgutil.get_data(self.__module__, 'contacts_big.json').decode('utf-8'))
         result = self.env['res.partner'].load(['name', 'mobile', 'email', 'image'], data)
         self.assertFalse(result['messages'])
         self.assertEqual(len(result['ids']), len(data))
@@ -973,7 +973,7 @@ class test_realworld(common.TransactionCase):
     def test_backlink(self):
         fnames = ["name", "type", "street", "city", "country_id", "category_id",
                   "supplier", "customer", "is_company", "parent_id"]
-        data = json.loads(pkgutil.get_data(self.__module__, 'contacts.json'))
+        data = json.loads(pkgutil.get_data(self.__module__, 'contacts.json').decode('utf-8'))
         result = self.env['res.partner'].load(fnames, data)
         self.assertFalse(result['messages'])
         self.assertEqual(len(result['ids']), len(data))
diff --git a/odoo/http.py b/odoo/http.py
index 13404daac1d..72bea6a04ee 100644
--- a/odoo/http.py
+++ b/odoo/http.py
@@ -597,7 +597,7 @@ class JsonRequest(WebRequest):
             request = self.session.pop('jsonp_request_%s' % (request_id,), '{}')
         else:
             # regular jsonrpc2
-            request = self.httprequest.stream.read()
+            request = self.httprequest.stream.read().decode(self.httprequest.charset)
 
         # Read POST content or POST Form Data named "request"
         try: