diff --git a/src/invidious/cache/item_store.cr b/src/invidious/cache/item_store.cr
index e4ec1201..ebe5b1f9 100644
--- a/src/invidious/cache/item_store.cr
+++ b/src/invidious/cache/item_store.cr
@@ -7,10 +7,10 @@ module Invidious::Cache
   abstract class ItemStore
     # Retrieves an item from the store
     # Returns nil if item wasn't found or is expired
-    abstract def fetch(key : String, *, as : T.class)
+    abstract def fetch(key : String)
 
     # Stores a given item into cache
-    abstract def store(key : String, value : CacheableItem, expires : Time::Span)
+    abstract def store(key : String, value : CacheableItem | String, expires : Time::Span)
 
     # Prematurely deletes item(s) from the cache
     abstract def delete(key : String)
diff --git a/src/invidious/cache/null_item_store.cr b/src/invidious/cache/null_item_store.cr
index c26c0804..0f599564 100644
--- a/src/invidious/cache/null_item_store.cr
+++ b/src/invidious/cache/null_item_store.cr
@@ -5,11 +5,11 @@ module Invidious::Cache
     def initialize
     end
 
-    def fetch(key : String, *, as : T.class) : T? forall T
+    def fetch(key : String) : String?
       return nil
     end
 
-    def store(key : String, value : CacheableItem, expires : Time::Span)
+    def store(key : String, value : CacheableItem | String, expires : Time::Span)
     end
 
     def delete(key : String)
diff --git a/src/invidious/cache/redis_item_store.cr b/src/invidious/cache/redis_item_store.cr
index ccf847a6..bd5550ef 100644
--- a/src/invidious/cache/redis_item_store.cr
+++ b/src/invidious/cache/redis_item_store.cr
@@ -5,19 +5,17 @@ require "redis"
 module Invidious::Cache
   class RedisItemStore < ItemStore
     @redis : Redis::PooledClient
-    @node_name : String
 
-    def initialize(url : URI, @node_name = "")
-      @redis = Redis::PooledClient.new url
+    def initialize(url : URI)
+      @redis = Redis::PooledClient.new(url: url.to_s)
     end
 
-    def fetch(key : String, *, as : T.class) : (T | Nil) forall T
-      value = @redis.get(key)
-      return nil if value.nil?
-      return T.from_json(JSON::PullParser.new(value))
+    def fetch(key : String) : String?
+      return @redis.get(key)
     end
 
-    def store(key : String, value : CacheableItem, expires : Time::Span)
+    def store(key : String, value : CacheableItem | String, expires : Time::Span)
+      value = value.to_json if value.is_a?(CacheableItem)
       @redis.set(key, value, ex: expires.to_i)
     end
 
diff --git a/src/invidious/exceptions.cr b/src/invidious/exceptions.cr
index 690db907..bdbc0c49 100644
--- a/src/invidious/exceptions.cr
+++ b/src/invidious/exceptions.cr
@@ -38,3 +38,7 @@ end
 # some important informations, and that the query should be sent again.
 class RetryOnceException < Exception
 end
+
+# Exception used to indicate that the config file contains some errors
+class InvalidConfigException < Exception
+end