diff --git a/CHANGES.rst b/CHANGES.rst
index 4af8dfb8..11d2e626 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -3,6 +3,8 @@ Changes
 
 Version 0.9.1 (UNRELEASED)
 --------------------------
+
+- Adds ``prune`` command to delete all intermediate files of a given workflow.
 - Fixes ``list`` command to correctly list workflows when sorting them by their run number or by the size of their workspace.
 - Fixes ``du`` command help message typo.
 
diff --git a/reana_client/version.py b/reana_client/version.py
index fb50bcc5..3395a223 100644
--- a/reana_client/version.py
+++ b/reana_client/version.py
@@ -14,4 +14,4 @@
 
 from __future__ import absolute_import, print_function
 
-__version__ = "0.9.0"
+__version__ = "0.9.1a1"