diff --git a/blackjax/__init__.py b/blackjax/__init__.py
index 44a9eed10..8760df0d3 100644
--- a/blackjax/__init__.py
+++ b/blackjax/__init__.py
@@ -9,7 +9,7 @@
     window_adaptation,
 )
 
-__version__ = "0.3.0"
+__version__ = "0.4.0"
 
 __all__ = [
     "hmc",  # mcmc