diff --git a/sigstore/_version.py b/sigstore/_version.py
index ff0d999e..b0039825 100644
--- a/sigstore/_version.py
+++ b/sigstore/_version.py
@@ -16,4 +16,4 @@
 Version information for `sigstore`.
 """
 
-__version__ = "0.3.1"
+__version__ = "0.4.0"