diff --git a/README.md b/README.md
index 83647fb..ca625ea 100644
--- a/README.md
+++ b/README.md
@@ -24,6 +24,12 @@ There is an [example configuration](cfg/example.json).
 
 ## TODOs
 
+Caching:
+
+- Add parameter `--cache` which saves retrieved DNS records as JSON files.
+- The method `update_record_destination` will then check if the arguments are the same as the saved JSON record.
+- Only if they differ, any requests to the API endpoint will be made.
+
 Alternative external IP detection:
 
 ```python
diff --git a/packaging/PKGBUILD b/packaging/PKGBUILD
index 1e89f30..324d8ba 100644
--- a/packaging/PKGBUILD
+++ b/packaging/PKGBUILD
@@ -5,7 +5,7 @@
 
 _name=netcup-dns
 pkgname="python-$_name-git"
-pkgver=r18.0485c33
+pkgver=r20.cdad070
 pkgrel=1
 pkgdesc='update DNS records with your current external IP address using the netcup DNS API'
 arch=(any)