diff --git a/pkgs/by-name/pr/pretalx/package.nix b/pkgs/by-name/pr/pretalx/package.nix
index e3838cdb7d8f..02af5de36b4d 100644
--- a/pkgs/by-name/pr/pretalx/package.nix
+++ b/pkgs/by-name/pr/pretalx/package.nix
@@ -111,6 +111,7 @@ python.pkgs.buildPythonApplication rec {
     "reportlab"
     "requests"
     "rules"
+    "whitenoise"
   ];
 
   propagatedBuildInputs = with python.pkgs; [