diff --git a/hosts/hainich/services/hasenloch.nix b/hosts/hainich/services/hasenloch.nix
index 3e169dc..49b4e27 100644
--- a/hosts/hainich/services/hasenloch.nix
+++ b/hosts/hainich/services/hasenloch.nix
@@ -11,10 +11,10 @@
       services.engelsystem = {
         enable = true;
         package = pkgs.engelsystem.overrideAttrs (oldAttrs: rec {
-            version = "3.1.1-r2r";
+            version = "main-c48664b";
             src = pkgs.fetchzip {
-              url = "https://schwe.by/files/engelsystem2.zip";
-              sha256 = "0kqididzlslzrcpx89pf57008lh040ghhhab83sz28zabsm9945q";
+              url = "https://schwe.by/files/engelsystem3.zip";
+              sha256 = "1rfbbl69llb4nd6kpz1zqs9aqlfj3qkrp4qc58mzcs1ng3px30b9";
             };
         });
         domain = "himmel.hacc.earth";