diff --git a/shard.yml b/shard.yml
index c068ec7..4f48538 100644
--- a/shard.yml
+++ b/shard.yml
@@ -16,6 +16,6 @@ dependencies:
   sqlite3:
     github: crystal-lang/crystal-sqlite3
 
-crystal: 0.24.1
+crystal: 1.0.0
 
 license: MIT
diff --git a/src/joann-pupper-bot.cr b/src/joann-pupper-bot.cr
index 39be481..27f54c8 100644
--- a/src/joann-pupper-bot.cr
+++ b/src/joann-pupper-bot.cr
@@ -1,5 +1,5 @@
 require "./joann-pupper-bot/*"
-require "logger"
+require "log"
 require "telepathy"
 require "time"
 require "sqlite3"
@@ -12,14 +12,22 @@ CHATID_DANIEL = 220888832_i64
 DATABASE_URL = "sqlite3://./data.sqlite"
 BOT_TOKEN = "599474797:AAEmjQNO32uqurI16blS9FT4OoO7GdUZ6h0"
 EXTENSIONS = ["png", "jpeg", "jpg"]
-LOGGER = Logger.new(STDOUT)
+LOGGER = Log.for("joann-pupper-bot")
 
 class BotConfiguration
-  JSON.mapping(
-    subreddits: Array(String),
-    send_cron: String,
-    refresh_cron: String,
-    recepients: Array(Int64))
+  include JSON::Serializable
+
+  @[JSON::Field(key: "subreddits")]
+  property subreddits : Array(String)
+
+  @[JSON::Field(key: "send_cron")]
+  property send_cron : String
+
+  @[JSON::Field(key: "refresh_cron")]
+  property refresh_cron : String
+
+  @[JSON::Field(key: "recepients")]
+  property recepients : Array(Int64)
 
   def initialize
     @subreddits = [ "rarepuppers" ]
@@ -75,12 +83,12 @@ class PupperBot
     unsent_query = "select id, title, url from posts where not exists (select * from recepient_posts where recepient=? and post=id) limit 1"
 
     unless to_send = @db.query_one? unsent_query, chatid, as: { Int64, String, String }
-      LOGGER.info "Unable to find a post to send to #{chatid}."
+      LOGGER.info { "Unable to find a post to send to #{chatid}." }
       return
     end
 
     id, title, url = to_send
-    LOGGER.info "Using URL #{url} for request from #{chatid}"
+    LOGGER.info { "Using URL #{url} for request from #{chatid}" }
     @db.exec "insert into recepient_posts(recepient, post) values(?, ?)", chatid, id
     @telegram_bot.send_photo(chatid, url, title)
   end
@@ -93,13 +101,13 @@ class PupperBot
 
   def update_database
     unless response = RedditResponse.from_subreddits(@configuration.subreddits)
-      LOGGER.info "Unable to find more posts for the database"
+      LOGGER.info { "Unable to find more posts for the database" }
       return
     end
 
     posts = response.data.posts_matching { |post| EXTENSIONS.any? { |it| post.url.ends_with? it } }
     posts.each do |post|
-      LOGGER.info "Trying to save post #{post.title} #{post.url}"
+      LOGGER.info { "Trying to save post #{post.title} #{post.url}" }
       begin
         @db.exec "insert into posts(title, url) values(?, ?)", post.title, post.url
       rescue
diff --git a/src/joann-pupper-bot/reddit.cr b/src/joann-pupper-bot/reddit.cr
index 374dfb9..2622f83 100644
--- a/src/joann-pupper-bot/reddit.cr
+++ b/src/joann-pupper-bot/reddit.cr
@@ -1,24 +1,40 @@
 require "http/client"
-require "json" 
+require "json"
 
 class RedditWrapper(T)
-  JSON.mapping(
-    kind: String,
-    data: T)
+  include JSON::Serializable
+
+  @[JSON::Field(key: "kind")]
+  property kind : String
+
+  @[JSON::Field(key: "data")]
+  property data : T
 end
 
 class RedditChild
-  JSON.mapping(
-    url: String,
-    name: String,
-    title: String)
+  include JSON::Serializable
+
+  @[JSON::Field(key: "url")]
+  property url : String
+
+  @[JSON::Field(key: "name")]
+  property name : String
+
+  @[JSON::Field(key: "title")]
+  property title : String
 end
 
 class RedditResponse
-  JSON.mapping(
-    modhash: String,
-    dist: Int32,
-    children: Array(RedditWrapper(RedditChild)))
+  include JSON::Serializable
+
+  @[JSON::Field(key: "modhash")]
+  property modhash : String
+
+  @[JSON::Field(key: "dist")]
+  property dist : Int32
+
+  @[JSON::Field(key: "children")]
+  property children : Array(RedditWrapper(RedditChild))
 
   def self.from_subreddits(subreddits : Array(String))
     request_url = URI.new scheme: "https", host: "www.reddit.com", path: "/r/#{subreddits.join "+"}/hot.json", query: "limit=30"