diff --git a/gpjax/__init__.py b/gpjax/__init__.py
index 072b0d3f..3c55b446 100644
--- a/gpjax/__init__.py
+++ b/gpjax/__init__.py
@@ -28,4 +28,4 @@
 )
 from .variational_inference import CollapsedVI, StochasticVI
 
-__version__ = "0.4.8"
+__version__ = "0.4.0"