diff --git a/environment.yml b/environment.yml
index f849716e..ce91772b 100644
--- a/environment.yml
+++ b/environment.yml
@@ -23,6 +23,7 @@ dependencies:
 - pytest
 - cryptography
 - pyyaml
+- twine
 - pip:
     - sphinxcontrib-fulltoc
     - pipreqs