diff --git a/ox/file.py b/ox/file.py
index 9791f81..7be0910 100644
--- a/ox/file.py
+++ b/ox/file.py
@@ -48,7 +48,7 @@ def _get_file_cache():
         path = path[3:]
     return os.path.join(path, 'files.sqlite')
 
-def cache(filename, type='oshash'):
+def cache(filename, type='oshash', update=False):
     conn = sqlite3.connect(_get_file_cache(), timeout=10)
     conn.row_factory = sqlite3.Row
 
@@ -68,11 +68,12 @@ def cache(filename, type='oshash'):
     info = ''
     for row in c:
         if stat.st_size == row['size'] and int(stat.st_mtime) == int(row['mtime']):
-            value = row[type]
-            if value:
-                if type == 'info':
-                    value = json.loads(value)
-                return value
+            if not update:
+                value = row[type]
+                if value:
+                    if type == 'info':
+                        value = json.loads(value)
+                    return value
             h = row['oshash']
             sha1 = row['sha1']
             info = row['info']