diff --git a/pkgs/applications/graphics/hydrus/default.nix b/pkgs/applications/graphics/hydrus/default.nix
index 32f6ac97fa37..9f0c4e950cc7 100644
--- a/pkgs/applications/graphics/hydrus/default.nix
+++ b/pkgs/applications/graphics/hydrus/default.nix
@@ -30,6 +30,7 @@ python3Packages.buildPythonPackage rec {
     cbor2
     chardet
     cloudscraper
+    dateutil
     html5lib
     lxml
     lz4