diff --git a/pkgs/wetter/default.nix b/pkgs/wetter/default.nix
index 9e223d0..0f06e72 100644
--- a/pkgs/wetter/default.nix
+++ b/pkgs/wetter/default.nix
@@ -12,6 +12,8 @@
   python2,
   python3,
   stdenv,
+  flask-excel,
+  pyexcel-xlsx,
 }:
 
 let
@@ -69,6 +71,8 @@ in buildPythonPackage rec {
     flask
     flask_sqlalchemy
     psycopg2
+    flask-excel
+    pyexcel-xlsx
   ];
 
   postInstall = ''