diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index 19a4fa709..0936e1d34 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.8.6
+current_version = 0.9.0
 commit = True
 tag = True
 
diff --git a/CITATION.cff b/CITATION.cff
index 8c89d0e5c..4eab6cd4e 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -5,7 +5,7 @@ authors:
   given-names: "Thibault"
   orcid: "https://orcid.org/0000-0000-0000-0000"
 title: "MAPIE - Model Agnostic Prediction Interval Estimator"
-version: 0.8.6
+version: 0.9.0
 date-released: 2019-04-30
 url: "https://github.com/scikit-learn-contrib/MAPIE"
 preferred-citation:
diff --git a/doc/conf.py b/doc/conf.py
index 400d9c96c..58989f4c8 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -88,7 +88,7 @@
 # built documents.
 #
 # The short X.Y version.
-version = "0.8.6"
+version = "0.9.0"
 # The full version, including alpha/beta/rc tags.
 release = version
 
diff --git a/mapie/_version.py b/mapie/_version.py
index de77196f4..3e2f46a3a 100644
--- a/mapie/_version.py
+++ b/mapie/_version.py
@@ -1 +1 @@
-__version__ = "0.8.6"
+__version__ = "0.9.0"
diff --git a/setup.py b/setup.py
index 4eb3bbb98..94571a0a6 100644
--- a/setup.py
+++ b/setup.py
@@ -3,7 +3,7 @@
 from setuptools import find_packages, setup
 
 DISTNAME = "MAPIE"
-VERSION = "0.8.6"
+VERSION = "0.9.0"
 DESCRIPTION = (
     "A scikit-learn-compatible module "
     "for estimating prediction intervals."