diff --git a/dev-environment.yml b/dev-environment.yml
index d87d70f..5bf73db 100644
--- a/dev-environment.yml
+++ b/dev-environment.yml
@@ -30,8 +30,10 @@ dependencies:
   - black
   - build
   - flake8
+  - isort
   - pytest
   - pytest-cov
+  - toml
   # Project from source
   - pip
   - pip: