diff --git a/cachalot/apps.py b/cachalot/apps.py
index 58088f5..87b0ab6 100644
--- a/cachalot/apps.py
+++ b/cachalot/apps.py
@@ -1,3 +1,4 @@
+import copyreg
 from django import __version__ as django__version__, VERSION as django_version
 from django.apps import AppConfig
 from django.conf import settings
@@ -93,4 +94,7 @@ class CachalotConfig(AppConfig):
     name = 'cachalot'
 
     def ready(self):
+        # Cast memoryview objects to bytes to be able to pickle them.
+        # https://docs.python.org/3/library/copyreg.html#copyreg.pickle
+        copyreg.pickle(memoryview, lambda val: (memoryview, (bytes(val),)))
         cachalot_settings.load()