diff --git a/src/config.cr b/src/config.cr
index 0647aee..69feccd 100644
--- a/src/config.cr
+++ b/src/config.cr
@@ -21,7 +21,7 @@ class Config
     home: true
   property download_timeout_seconds : Int32 = 30
   property sorted_entries_cache_enable = false
-  property sorted_entries_cache_capacity_kbs = 51200
+  property sorted_entries_cache_size_mbs = 50
   property disable_login = false
   property default_username = ""
   property auth_proxy_header_name = ""
diff --git a/src/library/cache.cr b/src/library/cache.cr
index 959e0eb..0165496 100644
--- a/src/library/cache.cr
+++ b/src/library/cache.cr
@@ -184,8 +184,8 @@ class SortedEntriesCache
 
   def self.init
     enabled = Config.current.sorted_entries_cache_enable
-    cache_size = Config.current.sorted_entries_cache_capacity_kbs
-    @@limit = Int128.new cache_size * 1024 if enabled
+    cache_size = Config.current.sorted_entries_cache_size_mbs
+    @@limit = Int128.new cache_size * 1024 * 1024 if enabled
   end
 
   def self.gen_key(book_id : String, username : String,