diff --git a/pkgs/by-name/pr/pretix/package.nix b/pkgs/by-name/pr/pretix/package.nix
index 0287b863ae2b..7a53ae82c1d0 100644
--- a/pkgs/by-name/pr/pretix/package.nix
+++ b/pkgs/by-name/pr/pretix/package.nix
@@ -82,6 +82,7 @@ python.pkgs.buildPythonApplication rec {
 
   pythonRelaxDeps = [
     "beautifulsoup4"
+    "bleach"
     "celery"
     "css-inline"
     "django-bootstrap3"