diff --git a/flake.nix b/flake.nix
index cb84ca5..7e5f6f2 100644
--- a/flake.nix
+++ b/flake.nix
@@ -92,7 +92,7 @@
           packages = with pkgs; let
             fmtNum = strings.fixedWidthNumber 2;
             fmtReleaseName = sem: author: chap: "${fmtNum sem} - ${fmtNum chap} - ${author.lastName}, ${author.firstName}.pdf";
-            fmtRelease = fmtReleaseName 3 {
+            fmtRelease = fmtReleaseName 4 {
               firstName = "Linus";
               lastName = "Nagel";
             };