diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4ae70ad3..cd50a20e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,9 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+- No changes yet.
+
 ## [1.19.0] - 2025-05-13
 
 ### Added
diff --git a/version.go b/version.go
index 03befc2d..ec3e2fd7 100644
--- a/version.go
+++ b/version.go
@@ -21,4 +21,4 @@
 package dig
 
 // Version of the library.
-const Version = "1.19.0"
+const Version = "1.20.0-dev"