diff --git a/environment-dev.yml b/environment-dev.yml
index 75c779eb..b90e1907 100644
--- a/environment-dev.yml
+++ b/environment-dev.yml
@@ -31,7 +31,6 @@ dependencies:
   - scipy
   - treelib
   - codecov
-  - bump2version
   - matplotlib
   - ipywidgets
   - ele>=0.2.0