diff --git a/Gemfile.lock b/Gemfile.lock
index 88ce038..a66b14e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    ocfl (0.3.0)
+    ocfl (0.4.0)
       activesupport (>= 7.0)
       dry-monads (~> 1.6)
       dry-schema (~> 1.13)
diff --git a/lib/ocfl/version.rb b/lib/ocfl/version.rb
index a5f0522..4ea7341 100644
--- a/lib/ocfl/version.rb
+++ b/lib/ocfl/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module OCFL
-  VERSION = "0.3.0"
+  VERSION = "0.4.0"
 end