diff --git a/mayan/apps/documents/settings.py b/mayan/apps/documents/settings.py
index 111bdc5d98..a704fd2cc6 100644
--- a/mayan/apps/documents/settings.py
+++ b/mayan/apps/documents/settings.py
@@ -10,9 +10,19 @@ from smart_settings import Namespace
 from .literals import (
     DEFAULT_DOCUMENTS_CACHE_MAXIMUM_SIZE, DEFAULT_LANGUAGE, DEFAULT_LANGUAGE_CODES
 )
+from .utils import callback_update_cache_size
 
 namespace = Namespace(name='documents', label=_('Documents'))
 
+setting_document_cache_maximum_size = namespace.add_setting(
+    global_name='DOCUMENTS_CACHE_MAXIMUM_SIZE',
+    default=DEFAULT_DOCUMENTS_CACHE_MAXIMUM_SIZE,
+    help_text=_(
+        'The threshold at which the DOCUMENT_CACHE_STORAGE_BACKEND will start '
+        'deleting the oldest document image cache files. Specify the size in '
+        'bytes.'
+    ), post_edit_function=callback_update_cache_size
+)
 setting_documentimagecache_storage = namespace.add_setting(
     global_name='DOCUMENTS_CACHE_STORAGE_BACKEND',
     default='django.core.files.storage.FileSystemStorage', help_text=_(
@@ -27,15 +37,6 @@ setting_documentimagecache_storage_arguments = namespace.add_setting(
         'Arguments to pass to the DOCUMENT_CACHE_STORAGE_BACKEND.'
     )
 )
-setting_document_cache_maximum_size = namespace.add_setting(
-    global_name='DOCUMENTS_CACHE_MAXIMUM_SIZE',
-    default=DEFAULT_DOCUMENTS_CACHE_MAXIMUM_SIZE,
-    help_text=_(
-        'The threshold at which the DOCUMENT_CACHE_STORAGE_BACKEND will start '
-        'deleting the oldest document image cache files. Specify the size in '
-        'bytes.'
-    )
-)
 setting_disable_base_image_cache = namespace.add_setting(
     global_name='DOCUMENTS_DISABLE_BASE_IMAGE_CACHE', default=False,
     help_text=_(
diff --git a/mayan/apps/documents/utils.py b/mayan/apps/documents/utils.py
index e33b45e9de..16f6e25d7b 100644
--- a/mayan/apps/documents/utils.py
+++ b/mayan/apps/documents/utils.py
@@ -1,5 +1,16 @@
 from __future__ import unicode_literals
 
+from django.apps import apps
+
+from .literals import DOCUMENT_IMAGES_CACHE_NAME
+
+
+def callback_update_cache_size(setting):
+    Cache = apps.get_model(app_label='common', model_name='Cache')
+    cache = Cache.objects.get(name=DOCUMENT_IMAGES_CACHE_NAME)
+    cache.maximum_size = setting.value
+    cache.save()
+
 
 def parse_range(astr):
     # http://stackoverflow.com/questions/4248399/