diff --git a/couchpotato/core/plugins/release/index.py b/couchpotato/core/plugins/release/index.py
index f509f486..8265fe33 100644
--- a/couchpotato/core/plugins/release/index.py
+++ b/couchpotato/core/plugins/release/index.py
@@ -50,15 +50,15 @@ class ReleaseIDIndex(HashIndex):
 
 
 class ReleaseDownloadIndex(HashIndex):
-    _version = 1
+    _version = 2
 
     def __init__(self, *args, **kwargs):
         kwargs['key_format'] = '32s'
         super(ReleaseDownloadIndex, self).__init__(*args, **kwargs)
 
     def make_key(self, key):
-        return md5(key).hexdigest()
+        return md5(key.lower()).hexdigest()
 
     def make_key_value(self, data):
         if data.get('_t') == 'release' and data.get('download_info') and data['download_info']['id'] and data['download_info']['downloader']:
-            return md5('%s-%s' % (data['download_info']['downloader'], data['download_info']['id'])).hexdigest(), None
+            return md5(('%s-%s' % (data['download_info']['downloader'], data['download_info']['id'])).lower()).hexdigest(), None