diff --git a/Casks/iordning.rb b/Casks/iordning.rb
index 1c2687ce5cc..929c5441256 100644
--- a/Casks/iordning.rb
+++ b/Casks/iordning.rb
@@ -1,8 +1,10 @@
 cask 'iordning' do
-  version '6.0.43'
-  sha256 '965818c8e43f51826edef0e9c4bc8a083d6b698b2fae2f63a1de2407f02c59a3'
+  version '6.0.53'
+  sha256 '4ea8d0246d8fa1bbd6d6fafcd0dc34b739b4543afd34f398bd2acd5be9f95084'
 
-  url "https://www.aderstedtsoftware.com/downloads/iOrdning#{version.to_i}.zip"
+  url "https://www.aderstedtsoftware.com/downloads/iOrdning#{version.major}.zip"
+  appcast 'https://www.aderstedtsoftware.com/economacs/v6_appcast.xml',
+          checkpoint: 'cb908d247b0bac307e0adbf196c1bac43a0e46b0142be22da4a07ce593098212'
   name 'iOrdning'
   name 'Economacs'
   homepage 'https://aderstedtsoftware.com/'