diff --git a/boards/utils.py b/boards/utils.py
--- a/boards/utils.py
+++ b/boards/utils.py
@@ -19,8 +19,6 @@ from neboard import settings
 from boards.abstracts.constants import FILE_DIRECTORY
 from boards.settings import get_bool, SECTION_FORMS
 
-CACHE_KEY_DELIMITER = '_'
-
 HTTP_FORWARDED = 'HTTP_X_FORWARDED_FOR'
 META_REMOTE_ADDR = 'REMOTE_ADDR'
 
@@ -31,7 +29,9 @@ ANON_IP = '127.0.0.1'
 
 FILE_EXTENSION_DELIMITER = '.'
 URL_DELIMITER = '/'
-CACHE_KEY_DELIMITER = ':'
+
+CACHE_PARAMS = '{}:{}'
+CACHE_KEY_DELIMITER = '_'
 
 DEFAULT_MIMETYPE = 'application/octet-stream'
 
@@ -71,7 +71,7 @@ def cached_result(key_method=None):
 
             cache_key_params += args
             for key, value in kwargs:
-                cache_key_params.append(key + CACHE_KEY_DELIMITER + value)
+                cache_key_params.append(CACHE_PARAMS.format(key, value))
 
             if isinstance(obj, Model):
                 cache_key_params.append(str(obj.id))