diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 8c28c97fd334..76d7004a7dac 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -2051,6 +2051,7 @@ in modules // {
       cytoolz
       datashape
       flask
+      flask-cors
       h5py
       multipledispatch
       numba