diff --git a/README.md b/README.md
index 379c341..7909c89 100644
--- a/README.md
+++ b/README.md
@@ -77,7 +77,3 @@ Under BSD license. See [LICENSE](LICENSE).
 
 - Install those packages: `conda install twine rever`
 - Run: `rever <VERSION>`
-
-- Edit `jupyter_archive/_version.py` and set the version back to `.dev0`.
-- Edit `package.json` and set the version back to `-dev`.
-- Commit `git commit -am "Bump to dev"`
diff --git a/jupyter_archive/_version.py b/jupyter_archive/_version.py
index cdd6a4f..efceacd 100644
--- a/jupyter_archive/_version.py
+++ b/jupyter_archive/_version.py
@@ -1,4 +1,4 @@
 # Copyright (c) Project Jupyter.
 # Distributed under the terms of the Modified BSD License.
 
-__version__ = '0.4.8'
+__version__ = '0.4.9'
diff --git a/package.json b/package.json
index 558112c..073293c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hadim/jupyter-archive",
-  "version": "0.4.8",
+  "version": "0.4.9",
   "description": "Make, download and extract archive files.",
   "keywords": [
     "jupyter",
diff --git a/rever.xsh b/rever.xsh
index 12acf05..ee718ac 100644
--- a/rever.xsh
+++ b/rever.xsh
@@ -1,3 +1,8 @@
+from rever.activities.command import command
+
+command('run_tests', 'pytest jupyter_archive/', '')
+command('publish_npm', 'yarn publish --access=public --new-version $VERSION', '')
+
 $PROJECT = 'jupyter-archive'
 
 $ACTIVITIES = ['run_tests', 'version_bump', 'tag', 'push_tag', 'pypi', 'publish_npm', 'ghrelease']
@@ -9,15 +14,4 @@ $PUSH_TAG_REMOTE = 'git@github.com:hadim/jupyter-archive.git'
 $GITHUB_ORG = 'hadim'
 $GITHUB_REPO = 'jupyter-archive'
 
-
-from rever.activity import activity
-
-@activity
-def run_tests():
-    echo "Run tests"
-    pytest jupyter_archive/
-
-@activity
-def publish_npm():
-    echo "Publish package to NPM"
-    yarn publish --access=public --new-version $VERSION
+# git commit -am "Bump to dev"
\ No newline at end of file